Tinkers won’t fabricate things for you if you don’t have space for it. This is fine, but that space should take into account what won’t be in your cargo hold after fabrication. For example, if you have 500kg left in your cargo hold, giving them six barrels of repair nanos to fabricate a patcher arm should leave you with 6.5 tons of space to put the patcher arm into instead of returning a no-cargo-space reply.

derakon 18 Apr 2020:

I assume this is the same issue as the one that prevents you from installing new armor from your hold if you don't currently have enough space to hold the old armor, even though you'll have enough space once the new armor is removed from the hold.

george moromisato 6 May 2021:

Fixed in 1.9 Beta 4. Thanks!