Hello,

I was getting the famous "Unable to cast object of type 'ASP.MyMasterPageName_master' to type 'ASP.MyMasterPageName_master'" error. then I set the batch=false and solved it. Now I'm precompiling my application before I put it on production server, which eliminates the need for setting batch to false.

My question is of the "what if..." type. What's the effect of having batch=false in a precompiled application? Is it ignored in precompiled applications? If yes, how does ASP.NET know that the application is precompiled so as to ignore it.

 Thanks

Hi aleroNY,

In "batch mode," the output of multiple source files is compiled into single assemblies according to the type of file, file dependencies, and other criteria. The result is a target site containing a set of assemblies with the executable code for the original source files. I think multiple MasterPage files sharing the same name "MyMasterPageName_master" might cause the issue.