[ADMB Users] Changes in getting/not getting an std file between Versions 9 and 10

[Larry Jacobson]

Folks-

1) I have an observation, a suggestion and a request for information 
about convergence and std file generation in ADMB Version 10 in Windows 
(Borland compiler).

2) Observation: Version 10 in Windows does not give an std file after in 
some cases were Version 9 did.

In particular, Version 10 seems to be pickier and will not generate an 
std file unless all of the parameters and sdreport objects are fully 
converged.  For example,  code like:

PARAMETER_SECTION
   sdreport_number xx
PROCEDURE_SECTION
   xx=0.0;

would generate an std file under version 9 (with the complaint 
"Estimated covariance matrix may not be positive definite") but version 
10 does not (and it doesn't complain).

3) Suggestion: I don't have a problem with the new approach but it would 
be helpful to get a diagnostic or a message.  It would be particularly 
good if the offending parameter(s) were identified (is this possible?).

4) Request: Can someone describe the current algorithm for determining 
if the std file is written?  Is there anything about the algorithm that 
might help locate problems quickly?

5) I attach a real world example (from Mike Wilberg at the University of 
Maryland, Chesapeake Bay Laboratory).  This code sets certain elements 
of an sdreport_vector called qr to zero (which admittedly it shouldn't 
do).  Anyway, the tpl prefixed NO_ generates an std file under version 9 
but not under version 10.  The tpl prefixed YES_ generates an std file 
under both versions.  The only difference between the two is that the 
vector qr is a vector in NO_ and an sdreport_vector in YES_ (see line 167).

6) I am getting anal in my old age...

Cheers!


-- 


**********************
"The contents of this message do not reflect
  any position of the Government or NOAA."
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Larry Jacobson
National Marine Fisheries Service
Northeast Fisheries Science Center
166 Water Street
Woods Hole, MA 02543-1026
Voice: 508-495-2317
Fax: 508-495-2393
E-mail: larry.jacobson at noaa.gov
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