BaseException when handling combined legacy wallet file

[marshallstokes]

compiled from source, fired up vialectrum and received a dialog stating my existing wallet had several combined wallets which is no longer supported by electrum, It offered to split the legacy file into one file for each "wallet". On approval of this proposal the process crashed with the following trace output:

"Traceback (most recent call last): File "./vialectrum", line 379, in <module> d.init_gui(config, plugins) File "/home/marshall/src/vialectrum/lib/daemon.py", line 283, in init_gui self.gui.main() File "/home/marshall/src/vialectrum/gui/qt/__init__.py", line 200, in main if not self.start_new_window(path, self.config.get('url')): File "/home/marshall/src/vialectrum/gui/qt/__init__.py", line 161, in start_new_window wallet = wizard.run_and_get_wallet() File "/home/marshall/src/vialectrum/gui/qt/installwizard.py", line 228, in run_and_get_wallet file_list = '\n'.join(self.storage.split_accounts()) File "/home/marshall/src/vialectrum/lib/storage.py", line 243, in split_accounts raise BaseException("This wallet has multiple accounts and must be split") BaseException: This wallet has multiple accounts and must be split