I was getting this error "AttributeError: 'NoneType' object has no attribute 'dataFrames'" today in a script that I was running against all STARTED services in AGS (10.2.2). I'm looping thru all those services, finding the MXDs and searching to see if the FGDB I'm needing to update is in the MXD, then creating a list of the services I need to STOP so I could replace the FGDB and then restart. This error was showing up on only one of my services (and therefore crashing). It turns out the for some reason, that mxd must be saved as 10.3.x, or so the error seems to indicate if I try to open with ArcMap 10.2.2.
The error occurred with "lyrList = arcpy.mapping.ListLayers(mxd)" so I wrapped in in a ListDataFrames loop, with no luck. Since there is no easy or reliable way to check for the version of an .mxd (from several hours of searching and testing a half dozen suggestions), I found the try: my best option, and I'll just include this service in my STOP list, just in case.
Thought I would give this thumbs up on the try: solution for anyone that might see this....we do what we need to get things done sometimes Snippet of my code, still under development for anyone interested. (will not run on its own)
# ....
def myMsgs(message):
arcpy.AddMessage(message)
print(message)
updateServices = []
for startedService in myServices:
mxdFound = False
update = False
#myMsgs("Reviewing service: {0}".format(startedService))
theServicePath = os.path.join(servicesDir, startedService)
if not arcpy.Exists(theServicePath):
myMsgs("...we have a problem")
exit
else:
myMsgs("Reviewing service: {0}".format(startedService))
for root, dirs, files in os.walk(theServicePath):
for fn in files:
fullPath = os.path.join(root, fn)
basename, extension = os.path.splitext(fn)
if not extension == ".mxd":
pass
else:
#myMsgs(" mxd file found")
mxd = arcpy.mapping.MapDocument(fullPath)
try:
# Do stuff with MXD using arcpy.mapping
for df in arcpy.mapping.ListDataFrames(mxd):
lyrList = arcpy.mapping.ListLayers(mxd)
mxdFound = True
for lyr in lyrList:
if lyr.isFeatureLayer and update == False:
if lyr.supports("dataSource") and update == False:
theSource = lyr.dataSource
if updateDS[0] in theSource:
update = True
myMsgs(" update {0}".format(startedService))
updateServices.append(startedService)
except AttributeError:
myMsgs("!!!! WARNING: This MXD has unreadable dataframes\n{} !!!!".format(mxd.filePath))
myMsgs(" -> will stop as a precaution....")
updateServices.append(startedService) # edit....forgot this on original post
pass
del mxd
for a in updateServices:
myMsgs("will stop {}".format(a))
# ....
