Rail Error Handling

PC*Miler Rail-Connect provides several error handling functions to help diagnose DLL operations and troubleshoot trips. These functions assist in identifying runtime issues when using your application’s interface to PCRSRV32.

All PC*Miler Rail-Connect functions return a negative number on error, with the value representing the error code. Use the PCRSGetErrorString() function to retrieve a text description of the error code. For a list of error codes and messages, see the PC*Miler Rail-Connect Error Codes documentation.

HRESULT PCRSGetError(int *errno)

PCRSGetError() returns the number of the last error the server encountered in the argument errno. Constants for each possible error are defined in the pcrsdefs.h header.

HRESULT PCRSGetErrorString(int errorCode, char *buffer, int bufSize, int *chars)

PCRSGetErrorString() retrieves the associated error text from the DLL’s resources. It returns the number of characters copied into the buffer in the argument chars.