Lisp doesn't work until I run another lisp

[alex_mcturk]

I am having a problem with my lisp,

it gives me the error message

"error: bad argument type: stringp nil"

But I run another lisp an "Old" version

(uses a different defun name)

after I use that code, my new code works fine every time?

what could be doing this ? 

[ВeekeeCZ]

Probably some global variable...

[Moshe-A · Accepted solution]

@alex_mcturk  hi,

"error: bad argument type: stringp nil"

This error arise when passing a nil variable (or an invalid) to a function that expect string

example:

(strcat "abc" nil)

why it works after you load and old lisp?

maybe a function (with same name) but a call with right variable 😀

Moshe