Mono sequencer troubles

ilya volum's icon

I've got this problem when opening the project and later when changing patterns. It says: dict_index out of range for key 3_pattern::mpulse.
and: no dictionary named 1_pattern, cannot access values.
Also cmnd+z function doesn't work properly if mono sequenser is on. In play mode if i changed a parametr, not in sequencer, i need to press cmnd+z six or more times to get to the begining. When audio is stopped undo works fine. This problem appear only with mono sequncer.
It starts to appear in ableton 9.0 with M4L version 6.1. Everything was fine for a long time, but once i tryed to change a pattern and got this bug.
So i delete everything and install ableton 9.6 and last Max. It doesn't helpd.
And i still didn't find a solution on web.
Please help.

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