Inverse multiplication can not be carried out. LASElNotSortedErr Matrix elements are not sorted. LASZeroInDiagErr Zero elements in matrix diagonal are not allowed. LASZeroPivotErr Factorization produces zero pivot elements. Matrix has structure which is not allowed for ILU factorization.
Iterative solver fails.
The current error status can be got by the procedure LASResult . Verbal description the the error occasion can be put out in the file File by the procedure WriteLASErrDescr .