Can't Get JAL Script Library to work in MPE

I first tried running a script library job that I had in Windows edition which I converted. I got an error "Keyword not found" when validating the script that called the script library job.

I then tried testing one of the sample script libary jobs that ships with MPE. I tried testing the "searcherrors" job by calling it as follows:

Dim result, boolean
Dim file, string

Set file, "c:\\temp\\essbase_hierarchy.log"

searcherrors file, result

I still got the error on validation that Line 6: Keyword not found. Can you tell me what I'm doing wrong.
Thanks