The documentation for the error "Use or USELSX name must be a string constant" contains an example that is incorrect, as both "Legal" lines of code result in compiler errors. The corrected text is as follows:
LOTUSSCRIPT LANGUAGE
Use LSModule ' Illegal
Use "LSModule" ' Legal
Const myModuleName$ = "LSModule"
Use myModuleName$ ' Legal
Change the name to a quoted literal or string constant.