synscan mount not responding, abort mount - by: deruazpepin

Hi,

I have a eq3-2 synscan mount connected on a raspberry pi via a serial cable and serial to usb converter.
I used kstars/ekos on a PC connected on the same network as the raspnerry via a router. All is wired connection.

When I slew to some object the mount controler of Kstar return (Status:"slewing" an then Status:"tracking", which is perfect.

After some time (typically 15mn 30mn but sometime more than 1hour) the mount controler of Kstars return Status "error" and then Status "Idle".

If I go in the log I see:

[2019-01-12T17:02:13.042 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] Goto - JNow RA: 2.91194 JNow DE: 89.3483 J2000 RA: 2.51414 J2000 DE: 89.2679 "
[2019-01-12T17:02:13.048 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <a#> "
[2019-01-12T17:02:24.015 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <Ka> "
[2019-01-12T17:02:24.078 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <a#> "
.....
<1A9F0400,3F7F1700#> "
[2019-01-12T17:02:24.265 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <Ka> "
[2019-01-12T17:02:24.265 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <a#> "
.....
[2019-01-12T17:11:02.227 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <#> "
[2019-01-12T17:11:02.236 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <e> "
[2019-01-12T17:11:02.290 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <1AE26400,3F710C00#> "
[2019-01-12T17:11:02.342 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <Ka> "
[2019-01-12T17:11:04.293 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <> "
[2019-01-12T17:11:04.356 Paris, Madrid INFO ][ org.kde.kstars.indi] - SynScan : "[WARNING] Synscan Mount not responding "
[2019-01-12T17:11:04.365 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] Abort mount... "
[2019-01-12T17:11:04.372 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] CMD <T> "
[2019-01-12T17:11:04.379 Paris, Madrid DEBG ][ org.kde.kstars.indi] - SynScan : "[DEBUG] RES <#> "
........

How could I solve this problem?

Thank for an advices

Update: I finally launch kstars directly on the rasperry pi to se if this could solve the issue, however the error is the same, so it is not an error linked to the networking.