HP MLIB User's Guide Vol. 2 7th Ed.

Chapter 15 Sparse Eigenvalues and Eigenvectors 1027
One-call usage DSEVE1
ier = ±724 QL iteration did not converge.
ier = ±725 Number of eigenvalues computed
exceeded storage limitations.
ier = ±726 Internal error involving access of
Lanczos recurrence vectors.
ier = ±727 Singular Value Decomposition did not
converge.
ier = ±728 Gram-Schmidt reorthogonalization
did not converge.
ier = ±729 Three numeric factorizations in a row
failed. Probable cause is that this is
not a symmetric generalized
eigenproblem.
ier = ±730 Number of trust regions formed
exceeded storage limitations.
ier = ±740 Error in deallocation of storage for
first set of Lanczos recurrence vectors.
ier = ±741 Error in deallocation of storage for
second set of Lanczos recurrence
vectors.
warnng Warning status. warnng includes several different
warnings encoded in a three-digit decimal integer:
low-order digit:
warnng = xx0 Normal return.
warnng = xx1 Fewer modes computed than
requested (interval does not include
requested number).
warnng = xx2 Fewer modes computed than
requested because eigenvalues are
wildly different in size.
warnng = xx3 Both of the above conditions occurred.
ten’s digit:
warnng = x0x Normal return.
warnng = x1x At some point in the process, an
inconsistent inertia count was found.
hundred’s digit:
warnng = 0xx Normal return.