I have used a CM PTP card for data sharing with another DCS.

I need to share 48 data signals. But as soon as I connect the MBPDReg block, a programming error appears.

I tried connecting each block one by one, but the same problem occurs.
I also tried using a timer and a counter, but the issue is still the same.

I performed Entire Compile and Entire Download, but the problem did not go away.
The programming error appears, and then the system starts running immediately.

I also stopped the CPU and did a warm up start, but the issue is still not resolved.

PSC7 9.1 SP2 UC3

Hello, 

There is a FAQ about how to diagnose the cause of a programming error with help of the WinCC alarm: https://support.industry.siemens.com/cs/ww/en/view/109814837. 

Presumably you are also receiving a similar alarm, perhaps this can help resolve the issue.