Memory violation error & page exception fault in c80 controller

[veeresh.suranagi]

Memory violation error & page exception fault in c80 controller.

find the log–please help me resolve this issue

Log_Page_exception_fault&Memoryviolation error_17.zip (158.9 KB)

[alexander.hefner]

Hi,

I can see 4 pagefaults in the logger, the last 2 one are pointing to programs / libraries named “OCFeedback”, “FLFeedback” and the last one “OCPerforma” - from the namin, I assume all of them are user programs (see screenshots below).

So you have to check those programs for memory violations, for example: array overflow or underflow, wrong pointer, string operations they violate the maximum string variable size, and so on.

Here’s a great post as starting point on how to debug page faults:

Troubleshooting Page Faults

1 Overview 1.1 What is a page fault? The processor throws an exception to the operating system if it tries to access an invalid or protected memory location. The B&R operating system logs this type of serious memory violation as a page fault (error 25314). 1.2 What can cause a page fault? Processor memory can become invalid as a result of programming errors such as: Null or incorrect pointer Division by zero Accessing an index of an array which does not exist (i.e. the 11th element of a 10 el…

Best regards!

[cesma2000 (M_z_C)]

Can you include the IEC-Check libraries in your project, this lib ad some infos to find memory violation (task and if out-of-bounds, div. by zero, pointer null and so on).