Even when I updated to votca 1.4 and used the mentioned command. I still 
 obtain same error.

On Thursday, January 12, 2017 at 11:10:08 AM UTC-6, Bijay Shrestha wrote:
>
> I am currently using VOTCA v1.3.1 and I took a look at the values of r and 
> I couldn't find repeated values of r. I have attached the files of the 
> resample and the initial file. 
>
> On Thursday, January 12, 2017 at 9:29:33 AM UTC-6, Christoph Junghans 
> wrote:
>>
>> 2017-01-11 20:14 GMT-07:00 Bijay Shrestha <bijay.s...@selu.edu>: 
>> > Output: 
>> > 
>> > Running subscript 'table_extrapolate.pl function_resample.pot 
>> > function_extra.pot' (from tags table extrapolate) dir 
>> > /usr/local/votca/share/votca/scripts/inverse 
>> > Use of uninitialized value in subtraction (-) at 
>> > /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl line 
>> 227. 
>> > Use of uninitialized value in subtraction (-) at 
>> > /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl line 
>> 227. 
>> > Use of uninitialized value in subtraction (-) at 
>> > /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl line 
>> 227. 
>> > Use of uninitialized value in subtraction (-) at 
>> > /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl line 
>> 227. 
>> > Illegal division by zero at 
>> > /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl line 
>> 227. 
>> > 
>> > Callstack: 
>> > /usr/local/votca/bin/csg_call - linenumber 199 
>> >     do_external - linenumber 177 in 
>> > /usr/local/votca/share/votca/scripts/inverse/functions_common.sh 
>> >         die - linenumber 109 in 
>> > /usr/local/votca/share/votca/scripts/inverse/functions_common.sh 
>> > 
>> ##############################################################################################################
>>  
>>
>> > # 
>> > # 
>> > # ERROR: 
>> > # 
>> > # do_external: subscript 
>> > # 
>> > # /usr/local/votca/share/votca/scripts/inverse/table_extrapolate.pl 
>> > function_resample.pot function_extra.pot # 
>> > # (from tags table extrapolate) failed 
>> > # 
>> > # Details can be found above 
>> > # 
>> > # 
>> > # 
>> > 
>> ##############################################################################################################
>>  
>>
>> > 
>> > 
>> > On Wednesday, January 11, 2017 at 8:55:41 PM UTC-6, Bijay Shrestha 
>> wrote: 
>> >> 
>> >> Hi there, 
>> >>     I was stuck in the post processing of the potential (to be 
>> specific on 
>> >> the extrapolation of the potential). Firstly, I clipped the irregular 
>> >> distributions especially the borders. Then I did the csg_resample and 
>> >> obtained the resampled table .pot file. Then when I went for the 
>> >> extrapolation using csg_call and got error messages. The command that 
>> I gave 
>> >> was: 
>> >> >> csg_call table extrapolate table_resample.pot \ 
>> table_extrapolate.pot 
>> >> 
>> >> The error message said that was it was dividing by zero and hence 
>> couldn't 
>> >> proceed. Are there any criteria for the process (because I was able to 
>> >> perform the extrapolation of some potential)? 
>> What version of VOTCA is this? 
>>
>> Looking at line 227 of table_extrapolate.pl: 
>>
>> https://github.com/votca/csg/blob/master/share/scripts/inverse/table_extrapolate.pl#L227
>>  
>> it seems the only way to get a division by zero error is if you have 
>> repeated r values in the first column of the table. 
>> Can you check that? 
>>
>> In VOTCA 1.4 you could use 
>> $ csg_call --options options.xml --ia-type non-bonded --ia-name X-X 
>> convert_potential gromacs <inputfile> <outputfile> 
>> instead do to all steps at once. (Search the mailing list for details.) 
>>
>> Christoph 
>>
>> >> 
>> >> Thank you in advance. 
>> > 
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>>
>>
>>
>> -- 
>> Christoph Junghans 
>> Web: http://www.compphys.de 
>>
>

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