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Fri Aug 29 21:45:21 2003 UTC (20 years, 10 months ago) by matthew
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    1: \label{Spreadsheet_Calculation}
    2: 
    3: The total number of spreadsheets in course can be tremendous, since it is
    4: the number of students times the number of assessments. LON-CAPA
    5: caches these sheets and only selectively invalidates those cache
    6: copies if potentially relevant data changes. 
    7: 
    8: The automatic spreadsheet devalidation catches student
    9: submissions, \textbf{PAR}a\textbf{M}eter changes, and spreadsheet
   10: changes, but not re-publication of a problem resource.  
   11: 
   12: \textbf{Spreadsheet_Max_Depth_Exceeded}
   13: 
   14: The ``Maximum Calculation Depth Exceeded''\index{Maximum Calculation
   15: Depth Exceeded error} error can occur when you reference other cells in
   16: calculations. For example, if you have: 
   17: 
   18: \texttt{G0 = Some\_complicated\_expression\\
   19:  X0 = G0>2?1:0}
   20: 
   21: Try replacing \texttt{X0}'s contents with \texttt{[
   22: (Some\_complicated\_expression) > 2]?1:0}. In other words, replace the
   23: reference to \texttt{G0} with the actual contents of \texttt{G0}. That
   24: might fix your error by removing one level of indirection that
   25: LON-CAPA must process in order to compute the result.
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