topic Re: error 000861: Destination field is not valid: in Python Questions

error 000861: Destination field is not valid:

JuanSerratosa_López — Thu, 10 Apr 2014 13:26:35 GMT

Hi everyone,

First I would like to highlight that I´m an absolut newby with python.
I trying to use this already created python tool but keep on receiving this error message: error 000861: Destination field is not valid:

It's a nested code so would be difficult to put all the different variables but the specific part of the code that is giving this problem is this:

gp.CostPath_sa("samp_lyr", cd_name, bl_name, "cost_path", "BEST_SINGLE", "")

All the input variables are fine, the only error cames from the last one (destination field) wich it´s supposed to be an optional variable. That´s why the "", because is empty.

Any suggestions??

Hope can understand the post.
Thanks!!

Re: error 000861: Destination field is not valid:

JamesCrandall — Sun, 12 Dec 2021 01:26:07 GMT

Maybe this?


gp.CostPath_sa("samp_lyr", cd_name, bl_name, "cost_path", "BEST_SINGLE", "#")

Re: error 000861: Destination field is not valid:

IanMurray — Sun, 12 Dec 2021 01:26:09 GMT

alternatively you could just leave the optional field off.


gp.CostPath_sa("samp_lyr", cd_name, bl_name, "cost_path", "BEST_SINGLE")

if not ArcGIS help says

destination_field
(Optional)

"The field used to obtain values for the destination locations.
Input feature data must contain at least one valid field."

Make sure your input variables have a valid field.

Re: error 000861: Destination field is not valid:

JuanSerratosa_López — Fri, 11 Apr 2014 12:17:15 GMT

Thanks Ian and James for your answers,

Finally the problem was that if you use a feature class as an input destination (not a raster) the input field is not optional. So I had to create the field and write the name in the code.

Cheers!!