Fix for #1530

"xUnits" is only used in Versions 1, 2, 3 of .pxp files; Version 5 uses "dimUnits" - see https://github.com/AFM-analysis/igor2/blob/43fccf51714661fb96372e8119c59e17ce01f683/igor2/binarywave.py#L501

Author: apdavison

neo/io/igorproio.py

@@ -133,7 +133,12 @@ def _wave_to_analogsignal(self, content, dirpath):
         header = content["wave_header"]
         name = str(header["bname"].decode("utf-8"))
         units = "".join([x.decode() for x in header["dataUnits"]])
-        time_units = "".join([x.decode() for x in header["xUnits"]])
+        if "xUnits" in header:
+            time_units = "".join([x.decode() for x in header["xUnits"]])
+        elif "dimUnits" in header:
+            time_units = header["dimUnits"].ravel()[0].decode()
+        else:
+            time_units = ""
         if len(time_units) == 0:
             time_units = "s"
         try: