topic Re: ExportToPNG error in Python Questions

ExportToPNG error

RobertRogers — Sat, 11 Dec 2021 16:24:22 GMT

I have this code, which is basically copied from the online help:

import arcpy
mxd = arcpy.mapping.MapDocument("CURRENT")
arcpy.mapping.ExportToPNG(mxd, r"D:\t.png")‍‍‍‍‍‍

It generates this error:

Runtime error 
Traceback (most recent call last):
 File "<string>", line 1, in <module>
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\utils.py", line 182, in fn_
 return fn(*args, **kw)
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\mapping.py", line 1228, in ExportToPNG
 layout.exportToPNG(*args)
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\utils.py", line 182, in fn_
 return fn(*args, **kw)
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\arcobjects\mixins.py", line 586, in exportToPNG
 return self._arc_object.exportToPNG(*args)
AttributeError: PageLayoutObject: Error in parsing arguments for ExportToPNG
‍‍‍‍‍‍‍‍‍‍‍‍

Exporting the map using file, export, works fine. I tried making the path on C: and that fails too. I tried using exportToJPEG and got the same sort of error.

Re: ExportToPNG error

RandyBurton — Wed, 14 Feb 2018 20:45:27 GMT

If you attempt to save the PNG to a location that you do not have permission, ArcMap will give an error like the one you received.

Re: ExportToPNG error

DanPatterson_Retired — Wed, 14 Feb 2018 21:10:08 GMT

The arcmap help topic for the current version of arcmap has a different code sample. Perhaps the 10.3 version was incorrect ExportToPng help topic, But as Randy suggests it is more likely that you aren't allowed to write to the 😧 drive or it may be a USB drive or something not quite 'real'. Try putting it in a folder in the drive r'D:\test\t.png' for instance

Re: ExportToPNG error

RobertRogers — Sat, 11 Dec 2021 16:24:24 GMT

Thanks.

I tried this code after creating a D:\test folder:

arcpy.mapping.ExportToPNG(mxd, r"D:\test\t.png")‍

I get the same error. I added "ALL APPLICATION PACKAGES" write permissions for the test folder but that didn't help.

D is a physical drive in my PC. All my data is stored on it; I don't have any trouble writing to it using the arcMap menus.

I'm not sure if this is significant but if I run this code:

arcpy.mapping.ExportToPNG(mxd, r"D:\test\t.png", df)‍‍

Then I get a slightly different error:

Runtime error 
Traceback (most recent call last):
 File "<string>", line 1, in <module>
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\utils.py", line 182, in fn_
 return fn(*args, **kw)
 File "c:\program files (x86)\arcgis\desktop10.3\arcpy\arcpy\mapping.py", line 1228, in ExportToPNG
 layout.exportToPNG(*args)
AttributeError: DataFrameObject: Error in parsing arguments for ExportToPNG‍‍‍‍‍‍‍‍

Re: ExportToPNG error

DanPatterson_Retired — Sat, 11 Dec 2021 16:24:27 GMT

In the first case, the 'AttributeError' was associated with the PageLayoutObject and in the second it was the DataFrameObject, it is as if the object isn't being obtained suggesting that you need more than the *.mxd name... see line 2 below

mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd") 
df = arcpy.mapping.ListDataFrames(mxd, "Transportation")[0] 
arcpy.mapping.ExportToPNG(mxd, r"C:\Project\Output\ProjectDataFrame.png", df, df_export_width=1600, df_export_height=1200, world_file=True) ‍‍‍

Re: ExportToPNG error

RobertRogers — Sat, 11 Dec 2021 16:24:29 GMT

Thanks again.

I forgot to mention that I have:

df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]‍

That part seems to be working because if I do

lyr = arcpy.mapping.ListLayers(mxd,"*Income",df)[0]‍
print lyr‍‍

Then it outputs the full name of the layer: "Median Household Income"

Re: ExportToPNG error

RandyBurton — Wed, 14 Feb 2018 22:47:00 GMT

By any chance are you trying to overwrite an existing PNG? Also, there is a similar tool to export to PDF (arcpy.mapping.ExportToPDF). If you try it, do you also get an error?

Re: ExportToPNG error

ChrisPedrezuela — Wed, 14 Feb 2018 22:54:50 GMT

if you do not need to specify a dataframe for your output, just try replace df variable with string "PAGE_LAYOUT".

if you are specifying a dataframe, make sure your wildcard string to filter the dataframe name is correctly spelled? maybe a typo error or an extra white space at the end of the dataframe name?

Re: ExportToPNG error

RobertRogers — Thu, 15 Feb 2018 01:32:03 GMT

It is an empty folder.

I didn't try ExportToPDF but I did try ExportToJPEG and it gave me the same sorts of errors.

Re: ExportToPNG error

RobertRogers — Thu, 15 Feb 2018 01:34:25 GMT

Thanks.

I tried "PAGE_LAYOUT" and it gave similar results. I also tried not providing anything and that didn't work either.

The wildcard filter is *Income, and lry reports that it is Median Household Income, so I think the wildcard is working properly.

Re: ExportToPNG error

RandyBurton — Thu, 15 Feb 2018 01:50:38 GMT

And file, export still works? Hmmm...

Re: ExportToPNG error

RobertRogers — Thu, 15 Feb 2018 13:19:01 GMT

Yes. Exporting using the menus continues to work fine.

Re: ExportToPNG error

RandyBurton — Thu, 15 Feb 2018 17:37:36 GMT

Are you running your code in the Python window inside ArcMap? Or are you using an IDE outside ArcMap?

Re: ExportToPNG error

RobertRogers — Thu, 15 Feb 2018 19:52:59 GMT

Things are working now.

I decided to upgrade from 10.3 to 10.6. After quitting all my running programs and starting the install process, the installer complained that ArcMap was still running. Task manager showed that it was still running, and using 13% of the CPU.

I suspect that the phantom ArcMap instance must have been doing something that was causing the problems. I should have taken my own advice and restarted the PC and I bet it would have worked from the start!