Script ending at loop

Question

I'm having an issue getting a loop to run in my map.  Something as simple as just trying to print "yay" won't iterate.  Here's what I have to even a test that I can't get to run.  Am I missing something?mxd = arcpy.mapping.MapDocument("Current")
mapLyr1 = arcpy.mapping.ListLayers(mxd, "sampleLayer") [0]
cursor = arcpy.SearchCursor(mapLyr1)
for row in cursor:
 print "yay"

Zeke · Answer

You might try running MXD Doctor on your original map.

GeoffOlson · Answer

I created a new mxd with my layers in it and it's working.  So I don't know what caused the issue to begin with.

GeoffOlson · Answer

Yeah, it's not the layer name.  Is it possible for an mxd to become corrupt that certain functions won't run?