can't open dac file

hello,

i'm trying to open a dac file but i get this message anytime i try "Control data of fem input are not available"
please what does it mean and how can i rectify it

thanks

This looks as if the dac file for some reason is not OK. The dac file contains all the model information (like the fem file) at the beginning - and FEFLOW cannot read these. If the file is not too large, you can send it by email (up to 10 MB) to support@dhi-wasy.de for checking. Otherwise the support team can give you an upload address.

it was a problem with FEFLOW 6. it coudn't open a dac file more than 2gig. i downloaded patch 2 and installed so it working now

thanks