Docking. Dumps all the fuel from both craft?

[JoeSchmuckatelli]

I left a transfer craft in orbit with plenty of fuel.  Undocked a Mun lander and successfully landed, intercepted and docked with the transfer craft.

On docking - the whole ship has no fuel

Anyone else seeing this?

[hatterson]

I did an Apollo style Duna and Ike mission and didn’t have issues. Fuel stayed normal the entire time, could transfer back and forth, etc

Do you have a save from before? Are you able to reproduce it if you load that save and run the mission again?

[18Watt]

I've seen that also (in 0.1.5), but wasn't able to reproduce the issue.  I haven't seen it in 0.2 yet, but also have not done many docking procedures since 0.2 arrived.  When I experienced it I was performing fuel transfers, then undocking.  After undocking, the fuel had disappeared from both vessesl.  Actually, more fuel disappeared than I had even transferred.  

Again, I wasn't able to reproduce the issue.

[JoeSchmuckatelli]

56 minutes ago, hatterson said:

I did an Apollo style Duna and Ike mission and didn’t have issues. Fuel stayed normal the entire time, could transfer back and forth, etc

Do you have a save from before? Are you able to reproduce it if you load that save and run the mission again?

I went back to the save before I separated the craft to confirm fuel existed and amounts.

Then I went back to the save before docking - and the transfer craft had no fuel.

It was repeatable from the standpoint of turning off the game and restarting + loading the save.

In another 'weird' development - despite having no fuel and not being able to set a maneuver node (because of it)... I was able to activate the engines.

Eyeballed a return, got a Kerbin intercept and dropped pe to 40km and let gravity plus drag do the rest.

Kerbal survived - but it was just plain weird.

[18Watt]

@JoeSchmuckatelli, I doubt I’ll be able to find it quickly, but there was a bug which described fuel disappearing during fuel transfers.  And also sometimes fuel mysteriously appearing during transfers.  Although murphy’s law dictates that the further your vessel is from KSC the greater the chances of fuel disappearing instead of appearing.

I’m not sure if a docking port(s) is required for the bug to appear, but every time I’ve personally seen the bug there was at least one docking port on the vessel.  In my case, a bunch of the really tiny docking ports.

If I recall correctly, the bug report I saw had a test apparatus which was as simple as possible- I don’t think it even had a docking port- just multiple fuel tanks, and a bunch of engines to act as ‘drain’ valves during testing.

And yeah, it was really odd and interesting when it happened to me.  And of course frustrating because I couldn’t reliably reproduce it.

[JoeSchmuckatelli]

14 hours ago, 18Watt said:

@JoeSchmuckatelli, I doubt I’ll be able to find it quickly, but there was a bug which described fuel disappearing during fuel transfers.  And also sometimes fuel mysteriously appearing during transfers.  Although murphy’s law dictates that the further your vessel is from KSC the greater the chances of fuel disappearing instead of appearing.

I’m not sure if a docking port(s) is required for the bug to appear, but every time I’ve personally seen the bug there was at least one docking port on the vessel.  In my case, a bunch of the really tiny docking ports.

If I recall correctly, the bug report I saw had a test apparatus which was as simple as possible- I don’t think it even had a docking port- just multiple fuel tanks, and a bunch of engines to act as ‘drain’ valves during testing.

And yeah, it was really odd and interesting when it happened to me.  And of course frustrating because I couldn’t reliably reproduce it.

The weirdest thing:

After re-reloading the save file with the 'no fuel' craft - I hit 'Z' and got thrust.  Still could not set a maneuver node (*no fuel*).  So I eyeballed a return transfer and lowered Pe to 40km on Kerbin.

Got home.

 

...

There was a LOT wrong with that craft:

• the Kerbal Manager would not let me move a Kerbal from one cockpit to the other - I had to EVA him
• the fuel was gone from both tanks - but some part of the game allowed the engines to operate
• fuel tanks gave no reading on fuel in the Parts Manager
• the engines worked anyway.
• there was no way to know whether or how to move Science! from one ship to another -- which may be a feature, not a bug