This problem is fixed by VSI ECO VMS 842L1_RTL-V0200.
As a temporary workaround, fall back to the previous version of the Pascal run-time library , namely SYS$LIBRARY:PAS$RTL.EXE, that was in place prior to installing ECO VMS 842l1I_RTL-V0100
and execute an INSTALL REPLACE DCL command to install the replaced version as a known image.