Resolving WinCC V11 Compile Crashes on Comfort Panels

Resolving WinCC V11 Compile Crashes on Comfort Panels

WinCC V11 (part of the TIA Portal V11 engineering framework) is known to crash during the Compile > Software (rebuild all) sequence when the project contains a Comfort Panel target such as the TP900 Comfort. The most frequently reported crash signatures in field installations are tied to three distinct root causes: a corrupted compile database in the project IM folder, stale polygon animations carrying conflicting visibility/appearance properties, and the introduction of the optional Reports object on panels that lack a compatible runtime build. This article consolidates the verified recovery paths, maps each symptom to its underlying defect, and gives the engineer a deterministic order of operations that avoids forcing a full reinstallation of TIA Portal.

1. Problem Statement and Observable Symptoms

Engineers upgrading legacy WinCC Flexible 2008 SP3 projects into TIA Portal V11 — or maintaining long-lived V11 installations while TIA Portal V12/V13 has been released — see one of the following failure modes:

Symptoms 1, 2 and 5 occur together on roughly 80% of the projects reported on the Siemens support portal. Symptom 3 is exclusive to projects that contain a Reports object under the HMI device tree. Symptom 4 is independent of the HMI compile path and is a TIA Portal shell bug rather than a WinCC generator bug.

2. Root Cause Analysis

2.1 IM (Compile Database) Folder Corruption

Each TIA Portal project carries a hidden subfolder named IM at the project root, parallel to the project file (.ap11) and the System folder. The IM folder holds the incremental compile output, the tag/trend/alarm cross-reference cache, and the HMI runtime image that is regenerated by the Compile > Software (rebuild all) action. When an engineer performs Save As, performs a project upgrade from V10.5 / WinCC Flexible 2008, or has the engineering station lose power during a compile, the IM cache can be left in a partially-serialised state. The next full rebuild then attempts to deserialise objects that no longer exist, triggering an unhandled exception in HmiRTm.exe (the HMI compile service).

The IM folder is the engineering equivalent of the Visual Studio obj and bin folders combined. Siemens documentation states that it can be deleted at any time; the next compile will recreate it. This is the single safest recovery step before attempting anything more invasive.

2.2 Stale Polygon Animations

WinCC V11 introduced Appearance animations (in V11 SP2) which supersede the older Visibility animation model inherited from WinCC Flexible 2008. When a polygon was first configured with a Visibility animation and the engineer later replaced it with an Appearance animation, the underlying XML representation stores both animations. The graphics designer correctly renders the Appearance animation, but the compile generator and the runtime both evaluate the Visibility branch, producing a mismatch that crashes the build whenever the visibility condition is true at the moment of snapshot generation.

The defect is invisible in the editor because the Visibility node is no longer shown in the Animations pane. The only guaranteed fix is to delete the object and recreate it, rather than to attempt a property edit.

2.3 Reports Object on Comfort Panels

The Reports object is a TIA Portal V11 SP2 (and later) feature that allows the panel to log data to a network printer or PDF. On TP900 Comfort and other Comfort-class panels, the Reports object is supported, but the WinCC V11 SP1 build of the generator does not properly enumerate the report scheduler sub-objects, causing the compile to dereference a null handle. Two reliable workarounds are documented:

1. Upgrade the project to TIA Portal V11 SP2 Update 5 (or later) — the generator was patched to handle the Reports object correctly. The minimum HMI runtime image for stable Reports support on TP900 Comfort is V11 SP2 Update 5 (build 11.0.6.0).
2. Remove the Reports object from the project, perform the Software rebuild, then re-add the report after the panel image is successfully generated.

2.4 Project View Crash on TIA Portal Shell

When TIA Portal V11 crashes on the Project view button (independent of the HMI compile), the cause is a corrupted portal layout or a dangling reference in the start page XML. Siemens' industry support team tracks this as a known shell defect, addressed by TIA Portal V13 and later. The fix is a clean profile reset, detailed in Section 4.4.

3. Pre-flight Checklist Before Touching the Project

1. Back up the project. Use Project → Save As and store the copy in a folder that does not contain any previous .ap11 backup. Do not overwrite an existing copy because the next steps will modify the project in place.
2. Confirm the engineering station runs the same TIA Portal version as the panel runtime. Mismatched versions (e.g. engineering V11 SP2 Update 5, panel runtime V11 SP1) produce a build that downloads but crashes on the panel at the first report trigger.
3. Check disk space on the engineering drive. A compile failure mid-write is the single most common cause of IM corruption. WinCC V11 requires at least 4 GB of free space on the system drive for the scratch IM cache.
4. Close every Siemens background service (S7DOS Help Service, S7Trace, ALM) via Control Panel → Administrative Tools → Services before clearing the IM folder. This prevents the file lock that otherwise blocks the deletion.

4. Step-by-Step Recovery Procedures

4.1 Clear the IM Folder (Primary Recovery)

This procedure resolves approximately 80% of the WinCC V11 compile crashes on Comfort panels.

1. Close TIA Portal V11 completely, including the portal shell and any spawned HmiRTm.exe processes. Verify in Task Manager → Details that no Siemens.Automation.Portal.exe or HmiRTm.exe remains.
2. Open Windows Explorer and navigate to the project folder. The default location is %USERPROFILE%\Documents\Automation\<ProjectName>\.
3. Right-click the IM folder and choose Delete. Confirm the UAC prompt if the project sits under Program Files.
4. Open TIA Portal V11, open the project, then perform Right-click HMI device → Compile > Software (rebuild all).
5. If the compile now succeeds, perform a project save immediately. The IM folder is recreated automatically with a consistent cache.

4.2 Remove the Reports Object (Reports-Specific Recovery)

If the IM-folder clear did not resolve the crash and the project contains a Reports node under the HMI device, perform the following:

1. Expand the HMI device tree: HMI_1 → Reports → Report_1.
2. Right-click Reports and select Delete. Confirm that you do not want to keep the report data; the engineering copy is non-recoverable from this point.
3. Perform the IM folder clear described in 4.1, then rebuild the software.
4. Once the panel image builds cleanly, re-add the report and recompile. If the second compile crashes again, the project must be upgraded to TIA Portal V11 SP2 Update 5 or later. See Section 4.5 for the upgrade path.

4.3 Rebuild Stale Polygon Animations

For projects where the compile succeeds but the runtime shows ghost visibility behaviour, or where the compile fails immediately on a screen that contains many polygon objects, perform a targeted object rebuild:

1. Open the Graphics designer for the failing screen.
2. Select every polygon (type Polygon in the filter at the top of the Objects pane).
3. For each polygon, open Properties → Animations. If the panel shows a Visibility entry while the visible configuration uses Appearance, the object carries the dual-animation defect.
4. Cut the polygon (Ctrl+X), paste it back (Ctrl+V). This forces the editor to reserialise the object without the stale Visibility node.
5. If the cut/paste cycle does not remove the Visibility entry, delete the polygon entirely and redraw it from scratch. Re-enter the appearance condition manually.
6. Save the screen, clear the IM folder (4.1), and rebuild software.

4.4 Reset the TIA Portal Shell Profile (Project View Crash)

For the Project view button crash that is independent of the HMI compile:

1. Close TIA Portal completely.
2. Navigate to %APPDATA%\Siemens\Automation\Portal\<version>\Profile. The <version> segment is V11 for TIA Portal V11.
3. Rename the Profile folder to Profile.old.
4. Rename the Settings folder to Settings.old (same parent directory).
5. Restart TIA Portal. The shell will rebuild the profile with factory defaults. The project itself is untouched; only the shell layout and recent files list are reset.

4.5 Upgrade Path When All Else Fails

If the project still crashes after the IM-folder clear, the Reports removal, the polygon rebuild, and the shell profile reset, the underlying defect is in the V11 SP1 generator. Upgrade the project to TIA Portal V11 SP2 Update 5 (or the highest V11 update available from the Siemens support portal). The upgrade is performed by opening the project in the newer installation and accepting the upgrade prompt. Siemens documents the upgrade as non-destructive for Comfort-class projects, but the engineer should still keep a backup of the V11 SP1 .ap11 file in case a tag reference does not migrate cleanly.

5. Verification Procedure

After each recovery step, perform the following verification sequence:

1. Clean compile. Right-click the HMI device and select Compile > Software (rebuild all). The compile must complete without a wizard dialog or a silent crash. The output window must show Compile completed successfully in green.
2. Cross-reference regeneration. Open the cross-reference editor (Tools → Cross-reference) and confirm that every tag, alarm, and screen reference is resolvable. A missing reference after a clean compile indicates the project still has a stale IM entry that was not fully purged.
3. Start simulation. With the engineering station, select Start simulation. The simulation runtime should open the start screen without a runtime error in the diagnostic buffer.
4. Trigger every report. If the project contains a Reports object, manually trigger each report from the simulation runtime. A successful PDF/print job is the strongest indicator that the report scheduler is healthy.
5. Download to the physical panel. With the TP900 connected via Ethernet and PROFINET, perform Download to device. The panel must reboot into the new runtime image within 90 seconds. If the panel displays Runtime error 2001 or hangs on the splash screen, the panel runtime image and the engineering version are mismatched — re-check the SP level.
6. Project view navigation. Click Project view from the start page. The shell must transition into the project tree without a crash. If the crash persists, repeat 4.4.

6. Preventive Configuration for Future Projects

1. Lock the SP level. Document the TIA Portal version (e.g. V11 SP2 Update 5, build 11.0.6.0) inside the project comment. This prevents a junior engineer from accidentally upgrading only the engineering station and shipping a mismatched image.
2. Avoid mid-compile power events. Use a UPS on the engineering station. A compile that is interrupted during the IM write is the most common seed of the next crash.
3. Run a periodic clean compile. Once per quarter, clear the IM folder and perform a Software rebuild on a copy of the production project. This catches animation defects before they reach the panel.
4. Restrict who can add Reports objects. Reports is the single most common source of compile crashes. Lock the device tree so that only senior engineers can add the Reports node.
5. Keep one HMI version per engineering image. Mixing V11 SP1, V11 SP2 and V13 projects on the same engineering station is legal but increases the chance of cache cross-contamination. Use a separate virtual machine for each major version.

7. Diagnostic Codes and Error Messages

8. Affected Hardware and Ordering Data

The TP700 through TP2200 Comfort family shares the WinCC Comfort V11 runtime generator. A defect that crashes the compile on a TP900 reproduces on every other Comfort panel of the same SP level, which is why the fix list is identical across the family.

9. When to Escalate to Siemens Support

Escalate to Siemens Industry Online Support when the following conditions are all true:

• The IM-folder clear (4.1), the Reports removal (4.2), the polygon rebuild (4.3) and the profile reset (4.4) have all been performed.
• The engineering station is running TIA Portal V11 SP2 Update 5 or later.
• The crash reproduces on a freshly created "Hello World" Comfort panel project on the same engineering station.

Open a support request via the Siemens Service Request portal, attach the Siemens.Automation.Portal.log file from %APPDATA%\Siemens\Automation\Portal\V11\, and include the project .ap11 file (or a sanitised copy if the project contains customer IP). The typical resolution time for a confirmed V11 generator defect is 6–10 business days with a hotfix delivered through the Siemens update server.

10. Frequently Asked Questions