Factorio Forums

In my save (attached), I have four rocket silos on Aquilo that are full on rocket parts (2x 100/100) and each have 1000 cryo science aboard. They have the automatic request box unchecked and are being supplied the science and rocket parts by inserters. The space platform "Aquilo Export" is in orbit requesting 16,000 cryo science, but none of the rockets are launching despite the request not being filled. I have dozens of empty inventory slots in the space platform, so it is not an inventory limitation.

Once I manually clicked the "Deliver Cargo" button in each silo and selected "Aquilo Export" as the target destination, the rocket launched as normal, and then proceeded to launch automatically as expected for subsequent science launches. This behavior was identical for all four silos. The save file attached is from when they were all still stuck.

Welcome to the forum, and thank you for the report.

It seems to be caused by the rocket silos containing some science packs in their inventory 5.
defines.inventory does not have an official designation for it.

Can be reproduced by an inserter dropping its hand into next rocket's inventory during early phases of launch and the rocket silo freezing in that moment.

Steps to reproduce:
1. Load attached save.
2. Place a heat pipe next to the rocket silo to unfreeze it and start the launching sequence.
3. When the inserter drops its hand into the silo, immediately remove the just placed heat pipe.
Rocket silo immediately freezes, its inventory 9 (containing 12 packs) moves to inventory 5, blocking further automatic launches.