64 bit TextFile ConnectionString unable to dynamically change?

Hello,

On a 64bit Itanium cluster, I'm having a problem dynamically setting the ConnectionString of a TextFile Source using the "EvaluateAsExpression" = True and setting the ConnectionString using an expression from a variable. I get the error message:

-1073647612,0x,The result of the expression "@.[User::vFullFilePath]" on property "ConnectionString" cannot be written to the property. The expression was evaluated, but cannot be set on the property.

This is not a problem at all on a 32bit machine. I can run the same package on 32bit and it runs fine.

The funny thing is, I'm able to dynamically change the ConnectionString of a Logfile that we're writing all of the errors to, which I believe is using a TextFile Destination connection under the covers somehow (I'm using the SSIS Logging, to a textfile).

Can anyone confirm if this is a problem in 64bit?

Thanks,

Andy

It just dawned on me that this may be due to the fact that I'm using "LocalHost" as a servername rather than my cluster name when I set up the UNC Path. I'll change that and see if it runs. I'm guessing that has to be the problem. Silly me.