On Wed, Mar 25, 2009 at 12:33, Marco Roos <[email protected]> wrote:

> One of my more extensive workflows apparently makes a mistake in one of
> the nested workflows, sometimes. This leads to output with the
> occasional empty string at the wrong list depth. Subsequent subworkflows
> fail as a result. It is very hard to reproduce this error. It hasn't
> happened when I tested the subworkflow separately, and it can occur at a
> different place in the output list each time I run the workflow.
> Therefore, I cannot really provide much more detail on the error,
> unfortunately.

Double check all your beanshell scripts in that nested workflow -
perhaps some of them have an if/else thing where they return a string
in one case and a list in another - that would not be legal. (They
would have to wrap the single string as a list as well).

-- 
Stian Soiland-Reyes, myGrid team
School of Computer Science
The University of Manchester

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