Hosting a server through Hamachi to play along with my friend. He can save just fine, but when I try to save my game crashes with an error. I'm not able to upload the .dat file, so the best I can do is upload a screenshot of the error message.
Thank you for reporting this bug, however, it would help next time if you post the contents of the crash log in a
Code Module (< > on the font menu), as well as posting a version number in the thread's title.
However, with the information you have provided, I can confirm that this is not a bug with the game.
You can solve this problem by uninstalling your current version of the .NET framework and install the latest version from Microsoft.
This is actually a duplicate thread of
http://pokemon3d.net/forum/threads/6913/, but since that thread was considered
Not a Bug, I shall do so here too.