Resolving TIA Portal V13 to V14 CM 1241 Conversion Error

Problem Overview

Engineers migrating a Siemens S7-1200 station from TIA Portal V13 SP1 to TIA Portal V14 (or V14 SP1) encounter the dialog error An error occurred while upgrading the project/library. The conversion aborts before the new project file (.ap14) is written. The TIA Portal log file lists the aborted conversion trace and the project remains usable only in V13 SP1 until the cause is cleared.

Symptom signature observed in the field:

• Source project compiles cleanly in TIA Portal V13 SP1 / V13 SP1 Update 9.
• Target environment is TIA Portal V14, V14 SP1, or V14 SP1 Update x where x < 7.
• CPU in the project: S7-1214C DC/DC/DC (6ES7214-1AG40-0XB0 or 6ES7214-1AE40-0XB0).
• Point-to-point module: CM 1241 RS-232 (6ES7241-1AH32-0XB0) configured for a barcode scanner.
• Failure occurs during the implicit library upgrade step, not during hardware configuration compile.

Affected Hardware and Software Matrix

Root Cause Analysis

The error is raised by the TIA Portal project upgrader when it cannot reconcile PtP (Point-to-Point) instruction blocks that were inserted into the V13 SP1 project against the reorganized "PtP communication" instruction library shipped with V14. The PtP library was rewritten in V14 to:

1. Decouple generic Send_P2P / Receive_P2P / Fetch_P2P from the protocol-specific USS, Modbus RTU, and ASCII drivers.
2. Introduce configuration handles (Send_Config, Receive_Config) as separate FB/DB pairs.
3. Migrate the legacy instance DB schema of PtP_Cmd, PtP_Status, and the PtP_Port tag table into a new structured version.

The upgrader attempts to rewrite every instance of these blocks. When the V13 SP1 project uses CM 1241 with a barcode scanner configured under ASCII / Freeport (the default for most Cognex, Datalogic, Honeywell, and Keyence serial scanners), the legacy instance DB contains hand-edited or scanner-vendor-supplied tag layouts. The V14 upgrader hits an unresolvable reference and rolls back the transaction with the dialog message.

The recommended cumulative update V14 SP1 Update 7 (or later) ships a patched library upgrader that performs the rewrite in two passes and tolerates user-extended PtP DBs. Earlier updates (V14 SP1, V14 SP1 Update 1-6) ship the original upgrader path that fails on these extended DBs.

Solution 1 - Update TIA Portal to V14 SP1 Update 7 or Later

This is the canonical Siemens recommendation. Apply the latest cumulative update for TIA Portal V14 SP1 before retrying the conversion.

Prerequisites

• Active Siemens Support Contract (SSC) or valid license to download updates from the Siemens Industry Online Support portal.
• Administrative rights on the engineering station to install updates.
• All TIA Portal instances closed; stop the Siemens.Automation.Portal.exe and the S7DOS Helper service.

Step-by-Step

1. Open Siemens Industry Online Support and navigate to Product Support → Automation Technology → SIMATIC Automation → TIA Portal → Updates.
2. Search for TIA Portal V14 SP1 Update 7 (entry ID 109751706) or a later cumulative update. As of this writing, Update 7 is the minimum revision that resolves the CM 1241 library upgrader issue.
3. Download both the executable package and the readme (PDF) to a local folder.
4. Close all TIA Portal windows. Disable any virus scanner real-time scan on the install path C:\Program Files\Siemens\Automation.
5. Run the installer as Administrator. Accept the license terms and choose Update / Repair.
6. Reboot when prompted. The installer updates the PtP library DLLs under Portal V14 SP1\Data\Resources\System Libraries\PtP.
7. Re-open the V13 SP1 project. TIA Portal prompts to upgrade the project; accept and confirm.
8. Save the project as a new name (Project_V14.ap14) once the conversion completes without errors.

Solution 2 - Remove the CM 1241 Before Upgrade, Reinsert After

If a TIA Portal update cannot be installed (offline workstation, locked image, frozen maintenance window), strip the CM 1241 from the V13 SP1 device configuration and from the program before converting.

Step-by-Step

1. Open the project in TIA Portal V13 SP1.
2. Open the Device Configuration of the S7-1214C station.
3. Drag the CM 1241 RS-232 slot out of the rack; acknowledge the warning that all references to it will be detached.
4. Open each program block that references PtP_Port, Send_P2P, Receive_P2P, or scanner-specific FB wrappers. Comment out or stub the call sites.
5. Delete the unused instance DBs that were generated for the CM 1241 PtP blocks.
6. Save the project. Run Project → Compile → Software (rebuild all). The compile must succeed before you proceed.
7. Open the project in TIA Portal V14 / V14 SP1. The upgrade will now succeed because no CM 1241 references remain.
8. Save as Project_V14.ap14.
9. In V14 SP1, drag a new CM 1241 RS-232 (6ES7241-1AH32-0XB0) into slot 101 of the S7-1214C rack.
10. Re-import the PtP instruction library from Options → Global Libraries. Use the V14 SP1 versions of PtP_Send, PtP_Receive, Send_Config, and Receive_Config.
11. Recreate the instance DBs and restore your barcode scanner wiring: 9600 bps / 8N1 is the de-facto default for industrial imagers; use the scanner datasheet for stop bits and flow control.
12. Compile the V14 project. Download to the CPU only after a clean compile.

Solution 3 - Switch Source Project to V13 SP1 Update 9

If you cannot apply the V14 update and cannot strip the CM 1241 (because the barcode scanner must keep running), bring the V13 SP1 environment to its highest revision before converting. The V13 SP1 Update 9 (entry ID 109311724) PtP library is the most compatible baseline for the V14 SP1 upgrader.

1. Download TIA Portal V13 SP1 Update 9 from Siemens Industry Online Support.
2. Install over the existing V13 SP1 Update 4 (or whichever Update is installed).
3. Open the project, recompile, save.
4. Convert to V14 SP1 Update 7 or later per Solution 1.

Verification Procedure

Confirm the conversion worked before downloading to the CPU.

1. Open the upgraded .ap14 project. The title bar should read TIA Portal V14 SP1 Update x with no banner warning.
2. Open Project Tree → Common Data → Libraries. The PtP communication library should show version 14.1.1.0 or later; no red exclamation marks.
3. Right-click the S7-1214C station and select Compile → Hardware and Software (rebuild all). The job must finish with status green check.
4. Cross-reference the CM 1241 RS-232 in the device view. The Properties → Port Configuration tab must show your original baud rate, parity, and flow-control settings unchanged.
5. Open the Watch tables you used for scanner debugging. The variable table must still display the PtP_Status, PtP_Port, and receive buffer tags without Address not found entries.
6. Perform an offline/online compare: connect to the S7-1214C, then Online → Compare offline/online. The CPU firmware must match the converted project's firmware selection.
7. Trigger a scan event on the barcode reader and verify the receive buffer fills in the watch table.

CM 1241 RS-232 Configuration Reference

Use this baseline when recreating the CM 1241 in V14 SP1. Values match the most common barcode scanner profile; adjust to your scanner datasheet.

Firmware and Library Compatibility Reference

Troubleshooting Matrix

Field-Proven Caveats

• The V14 SP1 Update 7+ upgrader is the supported path. Rolling back to a V14 base install is not supported by Siemens and will trigger the same fault on the next upgrade.
• If your barcode scanner ships a vendor-specific FB (common with Cognex DataMan and Datalogic Matrix), contact the vendor for the V14-compatible FB revision before the upgrade. Vendors re-package the Siemens PtP blocks and ship their own instance DBs, which the upgrader may not recognize.
• The CB 1241 RS-485 board (6ES7241-1CH30-1XB0) shares the same PtP library path as the CM 1241 modules. The same fix applies.
• If the S7-1214C firmware is V4.0 and the project is being moved to V14 SP1, raise the CPU firmware to V4.2 or V4.4 before the upgrade. V14 SP1 enforces a minimum CPU firmware of V4.2 for new installations.
• Always back up the .ap13 project file before any upgrade attempt. The upgrader does not roll back automatically.
• Disable Windows Controlled Folder Access during the upgrade so the install can write to %ProgramData%\Siemens\Automation.

Recommended Order of Operations

1. Apply TIA Portal V14 SP1 Update 7 or later on the engineering station.
2. Open the V13 SP1 source project and recompile.
3. If the project contains vendor scanner FBs, obtain V14-compatible revisions from the scanner vendor.
4. Run the upgrade. Save as .ap14.
5. Recompile in V14. Fix any remaining warnings before downloading to the CPU.
6. Update CPU firmware to V4.2 or V4.4 if not already done.
7. Download the project to the S7-1214C and put the CPU in RUN.
8. Verify scanner communication with a watch table on the PtP_Status and receive buffer tags.
9. Archive the upgraded .ap14 file and the latest CPU firmware version in your change-management system.