Problem:

When taking the default directives for a COBOL host dialect, a CANCEL verb does not cancel the called sub-programs, such as  Cancel.

Resolution:

  Actually, the host and Mainframe Express (MFE) both default to use NODYNAM.  In order for the CANCEL verb to have any affect, one must pass DYNAM, both on the host and in MFE.  IBM has documented this for VS Cobol II.  Here is the refernce from the latest IBM compiler for z\\OS:

  IBM Enterprise Cobol for z\\OS Programming Guide

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/IGY3PG20/2.4.19?SHELF=IGY3SH20&DT=20040220035836

2.4.19 DYNAM

   __________________________

  | >>____NODYNAM________>< |

  |     |____DYNAM_____________|

  |__________________________|

Default is: NODYNAM

  Abbreviations are: DYN|NODYN

  Use DYNAM to cause nonnested, separately compiled programs

  invoked through the CALL literal statement to be loaded

  (for CALL) and deleted (for CANCEL) dynamically at run time.

  CALL identifier statements always result in a run-time load

  of the target program and are not impacted by this option.

MFE matches this behavior, so in MFE, one must pass DYNAM as an additional directive for the CANCEL verb to be honored.