invalid argument system runtime error on line with variable lookup

[Fairlight]

At Thu, Oct 25, 2007 at 05:09:01PM -0400 or thereabouts, 
suspect Bruce Easton was observed uttering:
> 
> My original post does show that I could have (only) trailing spaces from:
> 
> filen{"@"{qual
> 
> but I have also tried previously filen{"@"{qual{""
> and that produced no difference (still an error on 5.0.07 Windows and
> still success on Unix 5.0.14).

Yeah, but if the "container" for it has s defined length, won't it still
pad out with spaces even if the expression uses a push-left null?  That's
only going to truncate if it's going into an uncast dummy or variable, I
thought.

Is it cast for a length or not?

mark->