NULNULNULNUL - Corrupted efs study?

[TURLIES]

Hi,

One of my efs studies is bringing up a Formula Output Window which describes - SyntaxError: unterminated comment

When I look at the study in the efs editor, only a quarter of the programming is now viewable, and on the last line it displays NULNULNULNULNUL....and this NUL text seems to have no end to it!

Is there any way to solve this issue, and save this study?

Thanks,
Paul