MP270B error 170003

Hello
I have a siemens simotion cpu 434 with a mp270 Of siemens.
The coomunication it's ok but I can't read the variables internal of simotion.
I read the error 170003 (the operator panel can't read the variable).
That is very strange if run the some project with the runtime with my pc the communication it's ok.
There is someone had this problem before and solved it?
thanks for your help

hi
The manual says you need to set the controller to online mode !

I think that "Set controller to online mode" pertains to error 170001, not 170003.

I dont know what that error message means, but previously I have had problems with the OP displaying the diagnostics buffer if I were simultanously online with the programing software.