Before you read the rest of this note, read this link:
z/OS Unicode Services Conversion Information Service fails after December 15, 2015 https://www14.software.ibm.com/webapp/set2/sas/f/redAlerts/20150930.htmlThe good news is that CMOD itself doesn't use iconv() and thus Unicode System Services.
The bad news is that CMOD does use the DSNUTILS Stored procedure, Java, and LDAP which do.
Ergo, get that fix installed soonest so you don't get bitten by an IPL after December 15, 2015.
Ed