Expressions not showing in SSRS report

I am building a report and the expressions are not displaying in preview.  What should I look for?
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Where do you have your expressions? Is it in a text box? Custom Code? Look to see that the data that you're basing the expresion on actually return data
compterkAuthor Commented:
Query runs, returns expected data.  Using CRMAF_ to run report on specific quote.  Report runs, but multiple expressions are blank.  Expressions were running a couple of days ago, but suddenly stopped.  1 expression still running, but I cannot explain any difference.
Sorry can't help as I've never used CRM with SSRS
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compterkAuthor Commented:
I do not think the issue is CRM related.  The report expressions should display in Preview and they are not.  I am guessing that SSRS/Visual Studio uses some sort of caching for the preview, but I do not know how to clear it (if that is what the issue is).  

My query runs and returns expected data.  When I preview report, the expressions are showing blank.
If your expression is complex, then I would break it up and try running different parts of it to see what results it is returning.
compterkAuthor Commented:
Found the answer, though it required a call to Microsoft.  Just in case you run into this for someone else.  In writing the report I broke up the queries into smaller (what I thought were more managible groups) and apparently, doing so created a problem with multiple querys and parameters stepping on each other.  Put everything into 1 query and problem was solved.

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Regular Expressions

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