Hello- I am a Graduate Assistant for an instructor who has written programs for statistics calculations such as binomial distributions and regressions. The programs had worked with no problem in Excel 2003. Now we are trying to use it with Excel 2007, and we are having some trouble. I have downloaded RandFriends and have ran the binomial distribution process in 2007 Excel and have received an error that says: "Compile error in hidden module: UFDBinomial" However, ther are two demo excel files in the RExcel file called RdemoDens. When I open the first RDemoDens excel file, I can run the processes and they work fine. When I run the second RDemoDens excel file, or a blank excel 2007 file, the processes do not work and I get the error message. I am trying to figure out what is different about the first RDemoDens excel file that allows the calculations to process correctly. I am thinking that something in the macro library in the demo must be different than what is in a blank excel document. I just cannot seem to figure out what it is. One thing that I did notice is that there are two different RExcel files in the RExcel folder. One is labled "RExcel" and one is labed "RExcel 2007." What are the difference between these two RExcel files? I am not sure if this has anything to do with the problem, but perhaps the excel demo in which our calculations work uses the correct RExcel file while a regular excel 2007 document does not call the correct one. If anyone has an idea about what might be happening here, or who else I could ask about the situation, I would appreciate any input. Thanks, Ben Ward [[alternative HTML version deleted]]