When you submit JCL to the internal reader using a REXX, the system changes the data set name by prefixing it with the username even though you have placed it within quotes.

For example ,when running this REXX exec
/* REXX  */
 .
 .
 .
 ADDRESS TSO 'SUBMIT "USER.PROJECT.CNTL(JCL001)" '
 .
Exit 0

you will receive this error message  ..
DATA SET mfuser."USER.PROJECT.CNTL(JCL001)" NOT FOUND

You are using the single and double quote marks in the wrong place.

This syntax will run as expected..

/* REXX  */
ADDRESS TSO "SUBMIT 'USER.PROJECT.CNTL(JCL001)'  "
Exit 0

Note that the whole SUBMIT comand is double-quoted, the dataset name is single quoted inside the command.  Although ,in REXX, single and double quotation marks can normally be freely interchanged; fully qualified data set names must be in single quotes.  The failing syntax may appear to have run successfully on a mainframe, but this is affected by the setting of "TSO PREFIX/NOPREFIX".