An error has occurred: An unknown error has occurred

Question

I have a report using InvoView for input parameters and displaying the output.  The report uses a date range to select data from the database.  I can run the report for many dates and date ranges, but when I use one particular date the report produced the following error after about 20 minutes - "An error has occurred: An unknown error has occurred".  This error is displayed in the InvoView window.  I can see the pageserver.exe thread still executing in the database monitor, so I know the thread is still processing.  Any help in determining what is this generic error and any how to resolve this issue would be greatly appreciated.
George

Answer 1

I'm kinda guessing here, but it sounds data related...
Are you sure there's data for 1/28/09?  Does the report assume there's data, and it's doing something it shouldn't if there's no data?
Can you scan the data for this date and see if you're getting valid data for all fields?
What is your data source (database, excel, whatever)?  Might a "date" field have an invalid date, for example?
If you don't have a lot of formula fields, add this to each (basic syntax):
dim debug as number
debug = debug / debug  'Cause divide by zero
This will pop up a window for each field as it is being calculated.  Run the report with a different date, and note the order of the fields as they pop up.  Comment out the divide by zero as each field pops up to get to the subsequent field.  Re-run the report for the date that causes the error (after uncommenting the divide by zeros), and follow the same process, until the error pops up.  This should give you an idea of what field has the issue.  Manually walk through that field's calculation with the data for the record to see what fails.
If it's not the first record that causes the error message, you can control which iteration the divide by zero occurs on with something like:
dim debug as number
global dbgcnt1 as number  ' probably want a different var for each formula field
dbgcnt1 = dbgcnt1 + 1
if dbgcnt1 > 10 then
  debug = debug / debug  'Cause divide by zero
end if
HTH,
Carl