Thanks for the answer, but I haven't solved the problem. This is the error code it's gives to me : -1073807346. It says: "This error code is not listed in the internal database, or you have wired a number that is not an error code (such as a DAQ task ID) to the error code input.". But this doesn't happen when I use 7.1 version. I have tried to modify this VI as you told me, but the error happens again. Thanks..
I send you this VI