| Re: newbie seeks to debug "% Syntax error." [message #61167 is a reply to message #61165] |
Fri, 04 July 2008 15:18  |
weitkamp
Messages: 33
Registered: October 1998
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Member |
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Tom:
> If I understand correctly (and please correct me if I don't!) IDL
> tries to evaluate "regrid(...)"
>
> 0 as a function or procedure on $IDL_PATH
>
> 1 as an array
>
> I'm guessing the etiology here is that IDL fails to find the
> definition, then gets the syntax error at the '=', which is illegal in
> an array.
That's right. It has happened to me that IDL doesn't find the routine
called, even if its *.pro file *is* actually somewhere in the !PATH.
In any case, adding
COMPILE_OPT strictarr
in the routine code (see the online help for COMPILE_OPT) will at
least force IDL to interpret parentheses as function calls (and
require square brackets for array indexing).
In the worst case, this will at least lead to more reasonable error
messages (i.e., "Attempt to call undefined procedure/function" rather
than a "Syntax error"). In the best case, it may lead to routines
running properly that stopped with an error before.
> ) So I'm guessing I need to find out who supplied this code, and find
> out from them where 'regrid' is defined. Am I missing something?
Far from understanding your sophisticated bash scripting, I would
guess that you're right on this one too...
Good luck
Timm
Tom Roche wrote:
> I'm very new to IDL (though not to coding), so I wanna make sure I
> understand the following problem correctly before I go up my food
> chain for help:
>
> My advisor just dumped got a big bucket o' IDL (of which he is not the
> author) in my lap. I copy/modified the top-level .pro file
>
> $ pushd ~/jjw/IDL
> $ cp regrid_mozt42_yyf.pro regrid_mozt42_tlr.pro
> $ chmod a-w regrid_mozt42_yyf.pro
>
> and am editing my copy. After reading some introductions to IDL I can
> run it and do some printf-style debugging. The problem I'm having is
>
> IDL> regrid_mozt42_tlr
>> % Compiled module: REGRID_MOZT42_TLR.
>
>> resfield = regrid(var,oldgrid=oldgrid, newgrid=newgrid, /use_grids, $
>> ^
>> % Syntax error.
>> At: /home/tlr/jjw/IDL/ncregrid.pro, Line 180
>
>> resfield = regrid(var[*,*,*,0],oldgrid=oldgrid, newgrid=newgrid, /use_grids, $
>> ^
>> % Syntax error.
>> At: /home/tlr/jjw/IDL/ncregrid.pro, Line 195
>
>> thisfield = regrid(var[*,*,*,j],oldgrid=oldgrid, newgrid=newgrid, /use_grids, $
>> ^
>> % Syntax error.
>> At: /home/tlr/jjw/IDL/ncregrid.pro, Line 200
>
>> % Compiled module: NCREGRID.
>> % Attempt to call undefined procedure/function: 'NCREGRID'.
>> % Execution halted at: REGRID_MOZT42_TLR 21 /home/tlr/jjw/IDL/regrid_mozt42_tlr.pro
>
> If I understand correctly (and please correct me if I don't!) IDL
> tries to evaluate "regrid(...)"
>
> 0 as a function or procedure on $IDL_PATH
>
> 1 as an array
>
> I'm guessing the etiology here is that IDL fails to find the
> definition, then gets the syntax error at the '=', which is illegal in
> an array.
>
> In my .bash_profile I have
>
> $ fgrep -e 'IDL' ~/.bash_profile
>> # for IDL
>> export IDL_DIR="/usr/local/rsi/idl"
>> export IDL_LIB="${IDL_DIR}/lib"
>> if [[ -z "${IDL_PATH}" ]] ; then
>> IDL_PATH="~/jjw/IDL:${IDL_LIB}"
>
> ~/jjw/IDL is the bucket o' IDL
>
> else
>> IDL_PATH="~/jjw/IDL:${IDL_LIB}:${IDL_PATH}"
> fi
>> export IDL_PATH
>
> and the scriptlet
>
> for DIR in ${IDL_PATH//:/ } ; do
> for CMD in \
> "find ${DIR} -type f -name '*.pro' | xargs grep -nie 'pro\|
> function' | fgrep -e 'regrid' | fgrep -ve ';'" \
> ; do
> echo -e "${CMD}"
> eval "${CMD}"
> done
> done
>
> produces
>
>> find ~/jjw/IDL -type f -name '*.pro' | xargs grep -nie 'pro\|function' | fgrep -e 'regrid' | fgrep -ve ';'
>> /home/tlr/jjw/IDL/mozem_regrid.pro:71:FUNCTION RegridSliceAW, data, newgrid=newgrid, oldgrid=oldgrid, $
>> /home/tlr/jjw/IDL/mozem_regrid.pro:210: grid->GetProperty, nlon=nlon, nlat=nlat, wlat=wlatn
>> /home/tlr/jjw/IDL/mozem_regrid.pro:211: oldgrid->GetProperty, wlat=wlato
>> /home/tlr/jjw/IDL/mozem_regrid.pro:340: oldgrid->GetProperty, wlat=wlato
>> /home/tlr/jjw/IDL/mozem_regrid.pro:341: grid->GetProperty, wlat=wlatn
>> /home/tlr/jjw/IDL/ncregrid.pro:73:pro ncregrid, filename, oldgridname, newgridname, oshiftlon=oshiftlon, $
>> /home/tlr/jjw/IDL/regrid_mozt42_tlr.pro:3:PRO regrid_mozt42_tlr
>> find /usr/local/rsi/idl/lib -type f -name '*.pro' | xargs grep -nie 'pro\|function' | fgrep -e 'regrid' | fgrep -ve ';'
>
> (I also looked at the lines with comments, but there were no
> results of interest. I'm guessing IDL does not do end-of-line
> comments? like this java fragment
>
> return false; // TODO: throw exception
>
> ) So I'm guessing I need to find out who supplied this code, and find
> out from them where 'regrid' is defined. Am I missing something?
>
> TIA, Tom Roche <Tom_Roche@pobox.com>
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