The files contained on this directory provide nonlinear least-square fitting
of slow motional EPR spectra.  The version # is 1.51b, updated 12/2/97.  

Numerous changes from the previous version are required to correct matrix 
overflow errors that may occur.  These changes have made only very small
differences in the calculation and are not noted at this point.  If you 
are operating  with the earlier version, it is recommended that you download
the newer versions and work with those for most reliable results.  

To obtain a working version of these programs, ftp the files contained here
to your computer and issue the command "make nlsl" to compile them.  This
should work directly on the RS/6000 line of computers and modifications may
have to be made for other compters.  If you have the tar facility on your
computer you should be able to transfer the file NLSL.tar that contains all
the files (created by: tar -cvf .nlsl.tar *;mv .nlsl.tar NLSL.tar) and
extract the files with the command: tar -x NLSL.tar.  Remember you must ftp
the tar file in binary mode.

When the executables are correctly compiled check the example run files on
the subdirectory EXAMPLES for program verification and documentation on how 
to use it. 

For pruning the basis set, see the programs and README file on the FTP site
directory EPRLL and examples 3 and 5.  The pruned file __.indx is needed for
doing the pruned optimization.

*********************************************

Update done on 12/15/97:

Programs 
statc.f
lmpar.f
lmnls.f
lfun.f

were changed as follows (as determined by the unix diff command):
The tar file has been updated to reflect these changes.

lfun.f
64a65
>       double precision x(n),fvec(m),fjac(ldfjac,n+nsite+nspc)
81d81
<       double precision x(n),fvec(m),fjac(ldfjac,n+nsite+nspc)

lmnls.f
212c212
<       integer i,iflag,j,l
---
>       integer i,iflag,j,l,ld

lmpar.f
114c114
<       double precision P1,P001,ZERO
---
>       double precision P1,P002,ZERO

statc.f
41c41
<       external itrim
---
>       external itrim,wtdres

