Scenario :
When we try to upload a specific form template, the processor usage go up to
100% and after a long wait the uploading fails with an error:
Object
'/7181acd5_db9c_4290_8c1d_f25c058415fb/cjazezpip8ym9_ckpnnp11fl_306.rem' has
been disconnected or does not exist at the server.

After turning on the diagnostic logging we found this:

TryRunConversion failed with unhandled exception
System.Runtime.Remoting.RemotingException: Object
'/7181acd5_db9c_4290_8c1d_f25c058415fb/cjazezpip8ym9_ckpnnp11fl_306.rem' has
been disconnected or does not exist at the server.     at
Microsoft.Office.InfoPath.Server.Converter.ConversionAppDomain.OperationRunner.get_ConversionLog()
   at
Microsoft.Office.InfoPath.Server.Converter.ConversionAppDomain.ExecuteInRemote(AppDomain
domain, SolutionCabinet solutionCabinet, SolutionIdentity solutionId)     at
Microsoft.Office.InfoPath.Server.Converter.ConversionAppDomain.<>c__DisplayClass4.<TryRunConversion>b__0()
   at
Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean
fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock
catchBlock, FinallyBlock finally...

The uploading works fine for simple forms (smaller in size). Here are some
details for the form which fails uploading...

It contains around 50 data connection (type: local XML file)
It contains 1 web services connection type.
It is a browser enabled form
There is a code behind associated with the template.
Total size of XSN is about 200K

The error point to the fact that some sort of conversion operation is failing.

Question 1: What goes behind the scenes during TryRunConversion ?
Question 2: What in the infopath for template design makes uploading
processor intensive ?
Question 3: What can we do to avoid this error ?