Error with BAPI's table output parameter

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Hi Webdynpro expert consultants,

I'm getting a weird error message when i try to execute my webdynpro applic.

500 internal server error

Failed to process request. Please contact your system administrator.

There is a RFC call to a R/3 system and the output param. is a table with a custom structure.

I did "apply template" with the concerning table and the layout view displays well the table with its column names and cells.

I based my work on the tutorial : "Get Flights" (create a web dynpro appl. accessing abap function) for dealing with input/output parameters of the bapi and for the ui elements.

Contexts seem also to be well configured.

Extra check I've done: i have put an external break-point in my bapi.

And everything was ok.

So I guess the source of the issue happens when my webdynpro receives data from the R/3 system.

Did someone experienced this ?

Thanks a lot in advance for your help.

Louis,