Most error messages are self-explanatory. The message gives the size of the matrices involved. Matrix types are referred to by the following codes:
Matrix or vector 1 Symmetric matrix 5 Band matrix 9 Symmetric band matrix 13 Lower triangular matrix 17 Lower triangular band matrix 25 Upper triangular matrix 33 Upper triangular band matrix 41 Diagonal matrix 63 Crout matrix (LU matrix) 65 Band LU matrix 73Other codes should not occur.
See the section on exceptions for more details on the structure of the exception classes.
I have defined a class Tracer that is intended to help locate the place where an error has occurred. At the beginning of a function I suggest you include a statement like
Tracer tr("name");
where name is the name of the function. This name will be printed as
part of the error message, if an exception occurs in that function, or
in a function called from that function. You can change the name as you
proceed through a function with the ReName function
tr.ReName("new name");
if, for example, you want to track progress through the function.