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Negative mass on parts. #11

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Lisias opened this issue Dec 4, 2018 · 11 comments

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@Lisias
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commented Dec 4, 2018

Some parts are getting negative mass when scaled down. Investigate.

See :
https://forum.kerbalspaceprogram.com/index.php?/topic/180017-engine-has-negative-mass/&do=findComment&comment=3492469

Note: this was happening on 1.3.1 , so, no novelty. KSP versions are not the problem.

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commented Dec 4, 2018

Possible relation with #9

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commented Dec 4, 2018

Occurence 1: KSP 1.3.1 and:

000_AT_Utils - 1.5
USI Tools - 0.10.2
ToolbarControl - 0.1.4.7
Ablative-Airbrake - 0.3
AlmostFreeLaunchClamps - 0.2.2
B9 Animation Modules - 1.1
B9 Part Switch - 2.1.1
B9 Aerospace HX Parts - 6.4
 CameraTools - 1.9
CCTV - 1.1.2
Chatterer Extended - 0.6.2
Chatterer - 0.9.93.1804
CollisionFX - 4.0
Community Category Kit - 2.0.2
Community Resource Pack - 0.8.1
CommunityTechTree - 3.2.1
CryoEngines - 0.5.11
CryoTanks - 0.4.9
Deadly Reentry - 7.6.2
DynamicBatteryStorage - 1.2
FASA Launch Clamps - 1.1.4
Ferram Aerospace Research - 0.15.9.1
Firespitter - 7.6
FMRS (Flight Manager For Reusable Stages) - 1.2.6
GroundConstruction - 1.2.1
HullcamVDSContinued - 0.1.8
JSIPartUtilities - 0.4.1
RasterPropMonitor - 0.29.3
Kerbal Engineer Redux - 1.1.3
Kerbal Joint Reinforcement - 3.3.3
KerbalLaunchFailure - 0.4.8
HyperEdit - 1.5.6
<color=#CA7B3C>Kopernicus - 1.3.1.7
KSP-AVC Plugin - 1.1.6.2
KWRocketryRedux - 3.1.4
MagiCore - 1.3.1
Infernal Robots - 2.0.14
ModularFlightIntegrator - 1.2.4
Monthly Budgets - 4.1.0.1
NASA_CountDown - 1.3.6.2
NearFutureConstruction - 0.8.4
NearFutureLaunchVehicles - 1.1.4
NearFutureProps - 0.3
NEBULA_DecalsContinued - 0.1.2
Procedural Parts - 1.2.15
RealChute - 1.4.5
RealFuels - 12.6
RealFuels Stockalike Configs - 3.2.3
RealSolarSystem - 13.1
Recovery Controller - 0.0.2
US and Soviet Solar Panels Pack - 1.5
RSSDateTime - 1.2
SCANsat - 1.1.8.4
SolverEngines - 3.5
StationPartsExpansionRedux - 1.0.2
TAC Life Support - 0.13.6
TweakScale - 2.3.7
USI Core - 0.5.1
Konstruction - 0.3.1
MKS - 0.53.2
VenStockRevamp - 1.9.5

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commented Dec 4, 2018

A possible explanation for this behaviour. Untested. Pure guess. But it worths some tests on the next time window.

https://forum.kerbalspaceprogram.com/index.php?/topic/140541-151-b9partswitch-v251-december-1/&page=16&tab=comments#comment-3499052

@Lisias Lisias changed the title Negative mass on parts. Negative ie Zero mass on parts. Dec 9, 2018

@Lisias Lisias changed the title Negative ie Zero mass on parts. Negative mass on parts. Dec 9, 2018

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commented Dec 9, 2018

Another issue. B9 Part Switch appears to be related only due popularity. (it yet another issue - created #12 for it)

Reports by Tonka Clash:

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commented Dec 11, 2018

Issue #13 should handle at least some of the problematic parts described here.

TODO: check them to see if every one of them are ModulePartVariants .

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commented Dec 29, 2018

Need help to confirm that his issue is directly related to #13 or if this is a new problem.

@Lisias Lisias added the duplicate label Dec 29, 2018

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commented Dec 29, 2018

Nope, I just confirmed. This issue is, in fact, directly related to #13 and #9 .

Closing this as DUP.

@Lisias Lisias closed this Dec 29, 2018

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commented Jan 28, 2019

Just to document that this is, indeed, happening on the field.

pellinor0#83

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commented Jan 29, 2019

Hi @Lisias. So apparently, this is a known issue :)
No complaints, I'm just happy there is more info available to troubleshoot it.

You asked about the KSP.log, here it is. Thanks!
KSP.log

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commented Apr 22, 2019

Yeah, this is happening again. This time, on the KSP installment from the fellow Kerbonaut Einstein_Cross_X1.

Evidences (KSP.log, ModuleManager cache, Add'Ons list):

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commented Jun 27, 2019

I'm not sure if this helps, but I've encountered the same error, both months ago and now. I've narrowed down the problem to these mods:

Real Fuels (stockalike config)
Real Fuels
Solver Engines
Tweakscale
Module Manager
Community Resource Pack

All are the most recent versions available on CKAN running on KSP 1.7.2.

Also worth noting is that this only happens when I scale down (not up) parts with Real Fuels set up, so KSPIE engines and non-engine parts work fine. Here is the log:

ModuleManager.zip

I tried using the Real Fuels configs to change the mass of the RK-7 back to its stock value on a different save, but it simply made the negative mass larger.

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