Package: zoneminder
Version: 1.35.5~20200707.77-buster
Severity: critical

Since a recent upgrade, we found the following message in the log 
repeatedly:

Jul 12 07:59:12 felix zma_m6[19229]: ERR [zma_m6] [Got empty memory map file 
size 0, is the zmc process for this monitor running?]

... and this for all cameras. When this happens the system shows the 
camera as being offline, then it automatically starts it again, until it 
crashes again a couple of seconds later.

Downgrading to zoneminder_1.35.5~20200627.22 fixed the issue

Thanks,

Alain

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