JCLCheck validation is displaying an improper CAY6046E error when DYNAMNBR=3000 is used on an EXEC statement.
CAY6046E "3000" IS TOO LARGE A VALUE FOR "DYNAMNBR"  PARAMETER OF "EXEC"           
It looks like the JCLCheck maximum DYNAMNBR is based on TIOT of 32k. Errors are displayed on values over 1635. 

Problem most likely to occur when the parameter value for DYNAMNBR is greater     
than a value of 1635.                       

Release:
Component: JCLCHK

APAR ST04480 corrects the issue with JCLCHECK improperly issuing message CAY6046E "nnnn" IS TOO LARGE A VALUE FOR "DYNAMNBR" PARAMETER  OF "EXEC"