topic Why does arcpy.mp.ArcGISProject() give an OSError? in Developers Questions

Why does arcpy.mp.ArcGISProject() give an OSError?

MatthewCallahan1 — Sun, 12 Dec 2021 16:37:39 GMT

I read the "Guidelines for arcpy.mp" doc, but when I call the sample code myself in the ArcGIS Pro Python window or from a Python script, I get this error:

import arcpy
aprx = arcpy.mp.ArcGISProject(r'C:\Path\To\Project\test_project.tbx')

Runtime error 
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "c:\program files\arcgis\pro\Resources\arcpy\arcpy\_mp.py", line 283, in __init__
    self._arc_object = arcgisscripting._mapping.ArcGISProject(*gp_fixargs((aprx_path,), True))
OSError: C:\Path\To\Project\test_project.tbx

Is this normal expected behavior? The example code shows setting the project variable with an explicit .aprx file path, and I'm wondering why I'm unable to do the same on my machine. The .aprx file is present/there are no misspellings in the file path in my code. For reference, I'm running a fresh Windows 7 64-bit install with a fresh ArcGIS Desktop install as well (Pro v 1.4.1).

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

DanPatterson_Retired — Fri, 02 Jun 2017 03:15:27 GMT

from the help topic why don't you reference the *.aprx, then you can get the toolbox as one of its properties. You are referencing the toolbox (tbx) directly.

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

MatthewCallahan1 — Fri, 02 Jun 2017 03:33:47 GMT

lol I'm dumb, that was it! Time for bed, enough Python for today!

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

KevinChristy1 — Thu, 04 Oct 2018 18:52:38 GMT

Dan, might you know why one would get this same exact error, but I am actually referencing the *aprx file?

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

MichaelVolz — Thu, 04 Oct 2018 18:56:22 GMT

Would you need to use Current in this circumstance?

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

KevinChristy1 — Thu, 04 Oct 2018 20:24:21 GMT

Disregard, I realized that due to the nature that my project file and .aprx had the same name that I was omitting the project folder...Thanks though!

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

ShraddhaSharma — Tue, 15 Nov 2022 19:21:06 GMT

Hi Dan I am also facing the same problem but with my aprx file.

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

AllenDailey1 — Mon, 23 Jan 2023 19:16:53 GMT

I'm having the same error, but with my .aprx path, not with a toolbox path. Have any of you been able to solve the problem?

Thanks!

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

AllenDailey1 — Thu, 26 Jan 2023 01:07:49 GMT

I think I figured it out. I haven't 100% tested this yet, but I believe the error resulted from the .aprx being Pro 3.0 while the machine I was running my script on had Pro 2.7, so it could not open or use the .aprx. I am going to upgrade that machine to Pro 3.0 sometime this week.

Update: it worked!

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

Sean-Sweeney — Thu, 02 May 2024 13:10:00 GMT

Thank you @AllenDailey1! Five minutes of Googling just saved me who knows how many hours of debugging.

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

AllenDailey1 — Thu, 02 May 2024 15:13:31 GMT

You're welcome @Sean-Sweeney ! Thanks so much for your comment; I'm so glad to know that my comment was useful for someone!

Re: Why does arcpy.mp.ArcGISProject() give an OSError?

StefanUseldinger — Thu, 23 May 2024 08:34:18 GMT

The OSError also appears when calling .save() while the project is still open on a different machine.