exception printing jasper reports

Hello,
we are lost we that problem since several days
when we run the solution in developer all the jasper report are printed without probmems
but when we run the solution form the server throws an exception that says:
"Exception calling form method ‘method_name’ with arguments null on form ‘form_name’ ‘’
As this exception come out only in the server we cant debug it
And why it say “argument null” this mehtod doesn’t have any arguments, (the call to the jasper report
made form this method yes, it have arguments)
Thanks in advantage for your help.

mo_ca_mo:
Hello,
we are lost we that problem since several days
when we run the solution in developer all the jasper report are printed without probmems
but when we run the solution form the server throws an exception that says:
"Exception calling form method ‘method_name’ with arguments null on form ‘form_name’ ‘’
As this exception come out only in the server we cant debug it
And why it say “argument null” this mehtod doesn’t have any arguments, (the call to the jasper report
made form this method yes, it have arguments)
Thanks in advantage for your help.

Could you please check the servoy log for any stack trace?
Also, is there no exception on the client? (could you please turn the Java Console on and see if there is any stack trace reported for the Smart Client)

Regards,
Andrei