Can't build ships in shipyard

[Faber81 (OP)]

Well, every 3 years or so i try and come back to this game, but for the first time I cannot even build a simple Survey ship. When I try to build the SV in the shipyard it doesn't appear in the shipyard list (or any other ship i designed anyway). Military or commercial alike. I really have no idea what am I doing wrong... any suggestion? Is it a bug?

[Andrew]

Almost certainly not a bug.
When you retool a shipyard for the new ship
Does the ship have military engines? If so must be a naval yard
Is the size of the ship smaller than the yard you are trying to retool, it must be or you will not have a choice to retool that yard for the ship
If your ship is smaller than the shipyard and you have the right engines it is odd.
So check your decimal seperator that could break this as well as everything else , if all of those are correct post a screenshot of the ship design and the yards screen maybe

[Faber81 (OP)]

Thanks for the answer. I checked all of the above mentioned possible problems before posting but it'not that.
Here's the Survey Vessel:

Abdiel class Survey Vessel      2,804 tons       42 Crew       310.5 BP       TCS 56    TH 250    EM 0
4458 km/s      Armour 1-17       Shields 0-0       HTK 15      Sensors 16/0/0/2      DCR 0-0      PPV 0
Maint Life 3.30 Years     MSP 534    AFR 126%    IFR 1.7%    1YR 74    5YR 1,110    Max Repair 150 MSP
Captain    Control Rating 1   BRG   
Intended Deployment Time: 18 months    Morale Check Required   

Apollo Commercial Ion Drive  EP250.00 (1)    Power 250    Fuel Use 5.30%    Signature 250    Explosion 5%
Fuel Capacity 150,000 Litres    Range 181.6 billion km (471 days at full power)

Thermal Sensor TH1.5-16.5 (30%) Thermal Sensor TH1.5-16.5 (30%) (1)     Sensitivity 16.5     Detect Sig Strength 1000:  32.1m km
Improved Geological Sensors (1)   2 Survey Points Per Hour

This design is classed as a Military Vessel for maintenance purposes
This design is classed as a Survey Ship for auto-assignment purposes

I even designed a pure commercial ship just to double check (so it's pretty random\bad):

Acheron class Freighter      34,962 tons       57 Crew       344.2 BP       TCS 699    TH 500    EM 0
715 km/s      Armour 1-95       Shields 0-0       HTK 19      Sensors 0/0/0/0      DCR 1-0      PPV 0
MSP 6    Max Repair 62.5 MSP
Cargo 30,000   
Commander    Control Rating 1   BRG   
Intended Deployment Time: 13 months   

Apollo Commercial Ion Drive  EP250.00 (2)    Power 500    Fuel Use 5.30%    Signature 250    Explosion 5%
Fuel Capacity 250,000 Litres    Range 24.3 billion km (392 days at full power)

This design is classed as a Commercial Vessel for maintenance purposes
This design is classed as a Freighter for auto-assignment purposes

[nuclearslurpee]

Can you provide a screenshot of your shipyards?

One thought is: have you assigned a class to the shipyard? Shipyards can only build ships of an assigned class or sufficiently similar design.

[Faber81 (OP)]

I am a fool! I kinda remembered (wrongly, but it's been a few years) that your first ship was free so I didn't need to retool... But I still need to assign the class of course! No faceplam is enough to decribe what I'm feeling right now...
Thank you kindly for your answer and your time, it was great help!

[Panopticon]

Don't feel bad, game is complicated and there are so many little things to remember. I lost so many ground troops before I was reminded that I had to mark enemies as hostile to fight them.