Error message during BEx analyzer execute

Using BEx analyzer, system show error message like below:

Variable 0P_FVAEX could not be replaced;

Program error in class SAPMSSY1 mehtod: UNCAUGHT_EXCEPTION

System error in program CL_RSR_REQUEST and form TEXT_ELEMENTS_GET:VARIABLES_SUBMIT(see long text)

Who can solve this problem? Thanks!

Message was edited by:

Almini Sanbra