Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 504

Thanks Wendy,

Out of memory error is on my development pc. That I accept it has only 4 GB.

but can you explain error message in the post title pls? (1st screen shot). That is on a high-end server. Spec I've given in my 1st post.

Regards,

-Jinantha