The fseek() or fseeko() function was called to relatively reposition with an offset greater than LONG_MAX in an OS data set using blocked I/O. The run-time supports data sets up to LONG_MAX blocks in size. Repositioning beyond LONG_MAX blocks is unsupported.
Correct the application to assure the relative offset is not greater than LONG_MAX.
JrEdcP131Ebadseek01