POLYMIN - University of Waterloo
POLYMIN - University of Waterloo
POLYMIN - University of Waterloo
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<strong>POLYMIN</strong> 2005<br />
7. PROBLEM DIAGNOSIS AND SOLUTIONS<br />
Table 4. Problem Diagnosis: <strong>POLYMIN</strong> Model<br />
Problem: Cause: Solution:<br />
PCG Matrix solver error message and<br />
program termination<br />
- Array dimensions are too small for<br />
your grid<br />
- fault in grid definition or time<br />
intervals<br />
- increase array dimensions in<br />
parameter statement and recompile<br />
- check input data file for grid<br />
definition, and time interval data<br />
solution not converging<br />
- time step too large<br />
- check tolerance, and maximum<br />
iteration limit<br />
- decrease time step<br />
bandwidth insufficient error - array limits are too small - increase array limits in parameter<br />
statement, and recompile<br />
I/O error on unit 5<br />
- fault in data file<br />
- check all input data lines, line<br />
continuation flags (more = +/- 1)<br />
40
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