STRINGSIZE is disabled throughout the program, except within
the scope of the STRINGSIZE condition prefix.
Result
After the condition action, the truncated string is assigned
to its target string. The right-hand characters, bits, widechars
or graphics of the source string are truncated so that the target
string can accommodate the source string.
Cause and syntax
The STRINGSIZE program-checkout condition is raised when you
attempt to assign a string to a target with a shorter maximum length.