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Error Messages

Fatal errors typically begin with a message  Exit -1 routine-name message, indicating where and why the program failed.

Sometimes non-fatal, warning messages are given. Usually the message has  “(warning)“  or something similar. If the warning is severe, there will be an accompanying exclamation mark, e.g.  warning!, which will be logged. For more details see severe warnings in troubleshooting.

In the page below, common error messages are shown together with a brief explanation and solution. Some of the same messages are explained in more detail on the troubleshooting page.


Table of Contents


General

unexpected value val1 for file rmt … expected val2
Problem: this error appears when the restart file (rst.ext or rsta.ext) contains augmentation radii that conflict with the input file.

Solution: Delete the rst.* file.

RSEQ : nit gt 999 and bad nodes for l=2. Sought 0 but found 1. e=-2.0811D-01
Problem: this error may occur for a myriad of reasons.

Solution: There is no one single solution. See troubleshooting.


Band codes

(warning): non-integral number of electrons — possible band crossing at E_f
Problem: In finding a Fermi level the integrator assigns weights to each state. This message is printed when the sum of weights don’t add up to an integral number of electrons.

Solution: As you proceed to self-consistency it may go away. If not, you need to modify your k mesh, or switch to sampling. It is important the the number of electrons be correctly counted. See also troubleshooting.

Exit -1 problem in locpot – possibly low LMXA, or orbital mismatch, species nam
Problem: this error usually occurs when lmfa generate an atm file with a different valence-core partition than is specified by the input file; see description in troubleshooting.

Solution: Re-run lmfa with current conditions.

warning! local orbital mismatch
Problem: lmf has found that the local orbitals specified in the input file are not consistent with those in the restart file (rst.ext or rsta.ext), rendering inconsistent valence-core partitioning.

Solution: remove rst.ext and re-run lmf.

Exit -1 zhev: zhegv cannot find all evals
Problem: The diagonalizer was unable to calculate all of the eigenvalues. This can happen for several reasons.

Solutions: see the troubleshooting page.

Exit -1 rdsigm: Bloch sum deviates more than allowed tolerance
Problem: A failure to carry out an inverse Bloch sum of the QSGW self-energy to sufficient accuracy. This is described in more detail on the troubleshooting page.

Solution: increase HAM_RSRNGE (at a slight increase in cost) or HAM_RSSTOL (at an loss in accuracy).
HAM_RSRNGE defaults to 5 (in units of the lattice constant); HAM_RSSTOL defaults to 5×10−6.

Exit -1 lgen: more than 1 missing plat … try reducing EWALD_TOL
Problem: There must be at least one primitive lattice vector of each kind in the table of direct lattice vectors for Ewald summations. This error appears when one or more is missing; this can happen especially with long, pencil like cells.

Solution: increase EWALD_TOL (at a modest increase in computational time for Ewald summations).


GW code

hsfp0 ixc=3: ecore>evalence
Problem: Some core state is higher than the lowest valence state.

Solution: See the troubleshooting page.

FERMI: Fermi energy lies above EMAX
Problem: this error is produced by the Fermi level finder, heftet. and indicates that it is unable to find a sensible Fermi level.

This can occur for several reasons, but the most common one is related to a bug in the GW codes. As they are now written, all spheres must have the same augmentation l-cutoff, lmxa.

Solution: Change input file to make LMXA the same for all atoms.

Exit -1 rdsigm unexpected value 10 for file sigm nqp … expected 64
Problem: this error is produced when the number of k-points used to make the QSGW self-energy Σ0 is different from what it expects. Usually this has to do with change in symmetry, e.g. turning on spin orbit coupling.

Solution: There are several solutions.

  1. Start from an input file where the symmetry is consistent with sigm.ext and write a Σ0 file without symmetry operations: --wsig:fbz.

    This will generate a file sigm2.ext. Copy it to sigm.ext and run lmf with lmf with this switch: --rsig:fbz.


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