Error information or empty string if no information is available.
Parameters:
[in]
pInstance
The TFORMer-Instance provided by a previous call to TFormer_Init.
Remarks:
This function is used to retrieve detailed information about an error. Call this function after any method returned an error code not equal to ErrOk (0). The error information holds extra information regarding the error - e.g. the text of a validation rule.