Field symbol has not yet been assigned

Hi,

When i open the Bex analyser from a particular computer say Computer1 i am getting the following eror

Field symbol has not yet been assigned

But when i open the BEx from the same user id in Computer2 , i am not getting any error and i am able to do my activities

Computer1 and Computer 2 are in Domain1 and Domain2.

The Server is in Domain2

Please guide of how to resolve this issue