HMI-Can't change the mode of operation

[Zhongxian]

Hello, thanks for you reply.

i can't change the mode from mannual mode to other modes;

when i reset cold from twincat side, i can change from mannual mode to other mode once, but can't to change back, or to other mode. 

the value of Station.Unit.ModeRequest is corrent when i click any of modes,  but Station.Unit.ModeSet can't change to the mode i request.

i also met a problem, that is my release conditions is ok, but all the buttons of the projects are not allowed to clik,no other mannual fucntion is running.

like the pictures below, i read plc code to oes, and export again, there is no effect.

[SteffenR-]

@RottG 
Your description sounds similar to the OpconBase Page Fault Exception problem which also can't be solved easily:

https://community.developer.bosch.com/t5/Knowledge-base/OpconBase-Page-Fault-Exception/ta-p/71255

It would be interesting if your case can be prevented by following the PLC Change Guide: 

https://community.developer.bosch.com/t5/Knowledge-base/TwinCAT-PLC-Change-Guide-English/ta-p/87937

[RottG]

Good idea, I will try it next time.