we do not do urgent
and accessing vsam thru assembler is not for the faint of hart or inexperienced people and itself cannot be done urgently!
z/OS V1R10.0 DFSMS Macro Instructions for Data Sets
at http://publibz.boulder.ibm.com/cgi-bin/ ... 0122165044
will tell all You might want to know,
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort