COBOL's STOP RUN is equivalent to the Fortran stop statement. If you code a COBOL STOP RUN statement, the T_I_S (Termination Imminent Due to STOP) condition is raised.

Calling ILBOABN0 or CEE3ABD causes T_I_U to be signaled. Condition handlers are given a chance to handle the abend. If the abend remains unhandled, normal Language Environment termination activities occur. For example, the Fortran stop statement is honored and the Language Environment assembler user exit gains control.

User-written condition handlers written in COBOL must be compiled with Enterprise COBOL for z/OS, COBOL for OS/390 & VM, COBOL for MVS & VM, or COBOL/370.