Describe() breaks on coverages

abaldenweck@blm.gov_BLM_EGIS

Hi all, 

I am running into something really weird and I was wondering if anyone could tell me what's happening here.

I have a coverage that I'm trying to describe.

 

 

 fdList = arcpy.ListDatasets()

# Print feature classes in Datasets   
    if fdList:
        for fd in fdList:
            print(fd)
            desc= (arcpy.da.Describe(fd))
            #print(desc)
            print(desc['catalogPath'], desc['datasetType'])
            if desc['datasetType'] == "FeatureDataset":
                print("true")

''' Yields:'''
# T:\...\nhd FeatureDataset
# true
# T:\...\nhdpt FeatureDataset
# true
# T:\...\nhdduu FeatureDataset
# true

 

 

However, if I try to do anything with it, I get an error:

 

 

    if fdList:
        for fd in fdList:
            #print(fd)
            desc= (arcpy.da.Describe(fd))
            #print(desc)
            print(desc['catalogPath'], desc['datasetType'])
            if desc['datasetType'] == "FeatureDataset":
                print("true")
                
            if desc['datasetType'] == "FeatureDataset":
                arcpy.env.workspace = os.path.join(dirP, fd)
                fdFCList =arcpy.ListFeatureClasses()
                if fdFCList:
                    for fc in fdFCList:
                        fList.append([os.path.join(dirP, fd, fc)])
'''Yields:''
# T:\...\nhd FeatureDataset
# true
# ---------------------------------------------------------------------------
# ValueError                                Traceback (most recent call last)
Line 4:    desc= (arcpy.da.Describe(fd))

ValueError: Object: Error in accessing describe

 

 

 In short, it'll do the first one or two feature datasets, then it'll break somehow.

Sometimes it does just the first, sometimes it does the first two.

Has anyone encountered anything like this before?

Thanks!

 

 

Edit: It looks like it has to do with setting the environment. How do I fix this? It worked fine for feature datasets in GDBs.

abaldenweck@blm.gov_BLM_EGIS

I ended up just resetting the environment to the original directory after appending all the feature classes.