MDM Trouble Report for 2017 Feb 26

Telescope: 1.3m
Observer(s): Jules Halpern (Columbia)
Instrument: Echelle

Problem(s) Encountered:
After closing at midnight for high humidity,
I tried to open 3 hours later using 'tx slit open',
which gave

ERROR slit cantopen=rain

in the TCS Session log.
I tried stopping and starting the telescope servers,
and restarting the TCS gui, to no avail.  I've seen
this error in a trouble report before, on 2016 April 8.
The 2.4m observers thought it could be due to ice,
so they didn't open manually.  But I doubt
that's the problem.  The humidity was 81%. 
Is this just a bug in the TCS?

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Submitted on 2017 Feb 27 [4:01:04]