Edited as requested.

Game crashes on "Mutex lock failed: invalid argument" when loading a save that contains a modded silo&rocket.

Attached is the crash log and a sample save containing the silo from the mod Planet Hoppers. If you load it with only the Space Age mod, the client will crash.

Very well. I have several popular mods which restrict cargo drops under certain conditions and 'right after launch' proved to be the best UX, and while there is performance cost they seem to work fine by scanning the surface and intercepting pods.

Hi there, would it be possible to move this thread to Bug Reports? viewtopic.php?p=666517#p666517

I originally made this post in Technical Help as I initially wasn't sure if it was simply a problem on my end.

For avoidance of doubt, this is the exact configuration used. My standalones have no problem read/writing data for mods or saves based on these configurations.

/Applications/factorio-alt.app/config-path.cfg:
config-path=__PATH__executable__/../config
use-system-read-write-data-directories=false ...

This seems the biggest gap in the cargo pod APIs and prevents mods from restricting cargo pod launches from space platforms (except by rapidly checking the surface for cargo pods or reacting late to the cargo pod leaving to space platform surface.)

Yes

On reflection, my problem would be solved by this simpler and more useful API: viewtopic.php?t=127527

An optional whitelist field for space platform hub prototypes, specifying which rocket silo entities are allowed to launch to that space platform, would enable modded rocket silos that can supply certain planets for a lower cost (and other special behavior).

This is currently impossible because ...

Currently it is impossible to build scripted space platforms whose logistic requests can only be fulfilled by a certain type of rocket.

This fact prevents a variety of useful mods. For example, since it is impossible to introduce a modded rocket silo wired to fulfill the logistic requests of the ...

Ideally we could make player-force asteroids that travel upwards, fighting the dastardly enemy asteroids that travel downwards.

Thank-you!

It would be useful to be able to hide space platforms from the sidebar GUI and the manual rocket launch GUI.

This would allow scripted space platforms that can trigger rocket launches by their logistic requests, but cannot be interacted with by the player directly.

Of course. Xorimuth’s note aside, you can’t take assets from commercial games made by professional artists and use them unlicensed, that devalues the artist’s work.

Understandably one may think this tricky to implement as the player may have items in their inventories.

Personally I would be satisfied with an API which returns true only if the attempt to have the player enter the rocket was successful.

To clarify, I already have two mods [ 1 , 2 ] which launch directly from planet to planet.

They suffer from two limitations relating to the GUI:
1. Although it is possible to make script-controlled space platforms whose inventory and logistic requests mimic a cargo landing pad on another planet ...

I would like to be able to send simple HTTP requests for the purpose of creating ingame leaderboards, ideally signed by the user and including a hash of the modlist and mod file contents.

Being unable to hide platforms restricts the possibilities with rocket silo mods.

It seems currently impossible to seamlessly make rocket silos that have custom launch behavior (eg to other planets) or can support logistic requests to other entities in the game.

If you call this on a player's force with a planet surface, the planet becomes hidden in the Planets list. If you call it on a space platform surface, the space platform still appears in the Platforms list.