specifies a character
constant, variable, or expression that is the name of the product
image that you are checking.
'pathname'
specifies the pathname
for the product image that you are checking.
Details
The MODEXIST function
searches the directories that are listed in the pathname argument
for an executable module. The name of the executable module is passed
to MODEXIST. MODEXIST returns 1 if the module is found, and 0 if the
module is not found.