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FP app crashes

Hi,
 

I have a FP application which tends to crash sometimes. The problem occurs only when the application is running and when I press an external cyclestart button witch signal is connected to a systeminput ("MotOnStart"). I have made several similar applications before but never had this error.

 

The following error message is displayed when the application crashes:

 

SYS_CTRL_E_RESOURSE_HELD

0x004841a

Requested resource is held by someone else