Initially I have been using version 5.1 I created a model in this version.
When I used the version 5.2 when opening the model of this version 5.1 has been updated. have added more tables and open the *. txp showing errors and not to open the model.
The test was made in a more resource pc i5 processor and 8GB of memory and no problems.
I think there are problems with version 5.2 in computer memory consumption low resources no longer allows large models to work on version 5.2.
Another problem is when a model with many tables has been able to work well in version 5.1. the problem is that when the model is updated to version 5.2 and can not go back to version 5.1.
That problem may be happening?