Copy FeatureClass

Question

Hello,

i want to copy a FeatureClass which is in a Feature-Dataset into an other Feature-Class (which is also in a Feature-Dataset).Both Feature-Classes are on different SDEs.arcpy.Copy_management(fromgdbpath + "\" + fd + "\" + fc,  togdbpath + "\" + toschema + "." + outfd+ "\" + toschema + "." + outfc, "FeatureClass")

I always get the following error:
('ERROR 000258: Output C:\...<Path>... already exists
Failed to execute (Copy).
',)

Of course the Output-FC already exists, but why is this a Problem? If I use the Copy-Geoprocessintool in ArcCatalog with the same Parameters everything works fine!
And if i copy Feature-Classes into other Feature-Classes which are not in a Feature-Dataset, it works, too.

Thanks for your help!

Cheers Mickey

MickeyO_Neil · Answer

No, these are two different machines. No upgrad was made.

My final solution:
I split my script in two parts: 
If I'm allowed to delete a FeatureClass I use:if arcpy.Exists(__toFCpath):
   arcpy.Delete_management(__toFCpath)
arcpy.Copy_management(__fromFCpath, __toFCpath)

And if i'm not allowed to delete a FeatureClass I use:arcpy.DeleteRows_management(...)
arcpy.Append_management(...)

and arcpy.AddIndex_management(...)

to copy the Indexes.

But be aware of Bug NIM084818 if you are using ArcGIS 10.2.0 or lower:
The Append geoprocessing tool fails to append field values for fields with field names that have 29 or more characters.

Cheers.
Mickey

MikeVolz · Answer

Is this an error that just appeared when you upgraded from v10.1 to v10.2?

MickeyO_Neil · Answer

It works on ArcGIS 10.1 when I use this Line of Code:arcpy.env.overwriteOutput = True

But when I want to run the same Script on an ArcGIS 10.2.1, the same ERROR shows up!
How is that possible? It's the same code?
Even the Place where I copy to, is the same ArcSDE in my local Network!