Can't print SSRS report LedgerTrialBalanceContract object not initialized.

when i try to print any report for trial blance (summery and details...etc)  i got this message error even after i did full CLI Compile 

LedgerTrialBalanceContract object not initialized.

Stack trace

(C)\Classes\LedgerTrialBalanceController\prePromptModifyContract - line 8
(C)\Classes\SrsReportRunController\startOperation - line 7
(C)\Classes\LedgerTrialBalanceController\main - line 9