I have an ASP.NET app that runs without fail in development. Recently the reports in production have begun to fail. When they fail they just hang, no error, nothing in event logs. I can only fix by resaving the report (note I don't need to make any changes). It then works for a few more attempts and then fails again.
Product is WIndows 2008 64bit. App built with VS 2010, ASP.NET C#.
Have installed both 64 bit runtimes and the complete VS Developer support. Both at latest service pack (6). No difference.
Tried making the report files read only. No difference.
Am banging my head against a wall with this, as is my client.
Anyone got any ideas?