OK I updated the RPi3 and the driver works now but gives a strange message on stdout, namely:

indiserver -m 100 -p 8000 indi_eqmod_telescope
2018-08-10T18:37:12: startup: indiserver -m 100 -p 8000 indi_eqmod_telescope
2018-08-10T18:37:12: Driver indi_eqmod_telescope: Using prefix /usr/share/indi//indi_eqmod_sk.xml
2018-08-10T18:37:12: Driver indi_eqmod_telescope: Using prefix /usr/share/indi//indi_align_sk.xml
2018-08-10T18:37:12: Driver indi_eqmod_telescope: Using prefix /usr/share/indi//indi_eqmod_simulator_sk.xml
2018-08-10T18:37:12: Driver indi_eqmod_telescope: Using prefix /usr/share/indi//indi_eqmod_scope_limits_sk.xml
2018-08-10T18:37:12: Driver indi_eqmod_telescope: EnumeratePlugins - found plugin SVD Math Plugin
The double / or is a typo somewhere, or there is an issue with a environment variable that should be set and is not. Not nice but not an issue because the driver works.

For the indi_pentax_ccd the situation is different.
I get the following message and the process died and goes to 10 restarts
indiserver -m 100 -p 8000 indi_pentax_ccd
2018-08-10T18:49:56: startup: indiserver -m 100 -p 8000 indi_pentax_ccd
2018-08-10T18:49:56: Driver indi_pentax_ccd: 2018-08-10T18:49:56: Driver indi_pentax_ccd: execlp: No such file or directory
Child process 1388 died
2018-08-10T18:49:56: Driver indi_pentax_ccd: stderr EOF
2018-08-10T18:49:56: Driver indi_pentax_ccd: restart #1
After 10 restarts and every time the same issue indiserver gives up.
So Pentax DSLR on RPi3 is not working at all: He does not find a directory while yesterday the issue was as reported for the eqmod_telescope.
Looking to the previously mentioned aesthetics issue, for the Pentax it may be that the double / makes that a file or directory cannot be found.

I remain online in case there would be a need for more info.
Stefan

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