737-300F not flying heavy cargo

[wapp11]

Posting this here as I'm in the beginners world.  Trying to figure out this game again after years away.  I have a 737-300F that will not transport heavy cargo.  From what I can tell it should be able to, and I have space allocated for heavy cargo and demand, but it won't transport any. Same thing on 2 routes. One of them I tried setting it to transport cargo only. The 737-400F I have is transporting heavy cargo. 

[Sami]

Heavy Cargo - Requires a dedicated freighter aircraft (cargo only) or a combi aircraft that is size class 'Very Large'.

https://manual.airwaysim.com/simulation-documentation/cargo-transportation


--> 737F can't do heavy cargo.

[wapp11]

Per your link in manual, a large aircraft can fly heavy cargo.  I believe the wording may mean it has to be VL for heavy if it's a combi, like the chart reads.  I had a 737-200Adv F flying it in another world.   Also have a 737-400F flying it in this world.   

[Sami]

Ah, misread the table in a small jetlag. LARGE sizeclass cargo-only plane is needed.

Increase the share of CH in route editor, since if I am not mistaken it now shows zero supply from you side?