Originally posted by GER Dave_Deluxe:

as well as 2 nurses/patients.

You have at least 3 nurses by day or else you wouldn't be able to open hospitalisations at the department.

My first guess is you don't have a nurse to transport the patient to the operating room.
Check the patient's card to see if it says 'waiting for transport'.

In my opinion, in a department with an operating room, you need at least 4 nurses to function properly and have surgeries performed.
2 medical surgery nurses and 2 nurses for the wards/transfers.
For a surgery, the 2 medical surgery nurses will go to the operating room and a third nurse will transport the patient.
So check the allowed roles of the nurses on the lower left of their card.

Error is found, some workshop department is to blame.

Good

Originally posted by Manouche:

Originally posted by GER Dave_Deluxe:

as well as 2 nurses/patients.

You have at least 3 nurses by day or else you wouldn't be able to open hospitalisations at the department.

My first guess is you don't have a nurse to transport the patient to the operating room.
Check the patient's card to see if it says 'waiting for transport'.

In my opinion, in a department with an operating room, you need at least 4 nurses to function properly and have surgeries performed.
2 medical surgery nurses and 2 nurses for the wards/transfers.
For a surgery, the 2 medical surgery nurses will go to the operating room and a third nurse will transport the patient.
So check the allowed roles of the nurses on the lower left of their card.

In addition to the ward doctors, I had 1 doctor, 2 assistants, 1 anesthesiologist and at least 2 nurses, one who only ever transports and 2 nurses for the operating room.

But thanks anyway

Now I have built a completely new hospital and everything has worked, now I wanted to continue playing and again all the surgical teams are sitting around and preparing the operation, all rooms are free. Nothing happens.

Why is that so

It can be a variety of reasons and it's a normal status unless it's for hours then something is blocking the surgeries.
If it worked before then maybe the operating rooms need cleaning, like if you have surgeries at night, you need a janitor at night too.

Thanks for the answer,

Whole shifts go by and no operation starts.

I have operations teams for the nights and also janitors, the ORs are always a complex of OR room, on-call room (i.e. the room for the doctors, I don't know what it's called in English), nurses' room, WC and storage room for the janitors who only look after these rooms.

Try to change the roles, deselect/change/reselect or put back everybody on default roles.
Look at the status of the patients, what are they waiting for ? Surgical team, transport, operating room ? It should give you a clue to start investigating.

Originally posted by GER Dave_Deluxe:

I have the problem on all wards that the operating theaters are not being used, operations are planned and patients are waiting for them to start. I have a surgeon, an anesthetist, and 2 additional doctors (also surgeons) assigned only to the role in the operating room, as well as 2 nurses/patients.

I have this composition both in the day and in the night shift.

They have all been sitting at the computer for 2 days preparing for the operation.

Do any of you have an idea what's going on?

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Which department is it? Doctors in this game don't seem to do much surgery. I don't know what the cause is, but something similar happened to me in the internal medicine department. Apparently, even if the system meets the minimum number of people required and the ward is functioning, they rarely perform surgery. This means that the minimum number of people is incorrect, and a major review by the development team is necessary.

If you are really concerned, the best thing to do is to take a video or screenshot and send the data to the development team for verification.

I'll leave it up to you to decide what to do, but one thing I can say is that I don't care about Manouche, who is replying to me now. He has been bothering me about all my bug reports lately, but he just finds flaws and gives irrelevant advice and never solves anything. He also got involved with me when I submitted a bug report before, but in the end it didn't solve anything. To be honest, it's a waste of time to get involved with him. If that's the case, it would be better to ask the development team to verify it, as it will be resolved more accurately and quickly. At this point, I don't even know what he wants to do, and it's just frustrating. It's clear that getting involved with him will only make things even more confusing. Many people other than you and me have reported bugs, but have any of them been solved by getting involved with him? I wonder.

If you want to solve this problem, your first priority should be to break free from the spell of that guy, Manouche. I recommend blocking him.

Originally posted by Manouche:

Try to change the roles, deselect/change/reselect or put back everybody on default roles.
Look at the status of the patients, what are they waiting for ? Surgical team, transport, operating room ? It should give you a clue to start investigating.

The doctors and nurses spend the whole shift preparing for the operation. I swapped the roles for all of them, but it didn't help.

I've noticed that when I'm in the normal on-call room where the doctors are sitting for treatment and the nurses' roles are still active for the operation, EVERYONE is preparing for the operation, not just the ones with the roles.

The patients are in status: waiting for a free operating room.

I've also noticed that all my janitors are always at home, only in the emergency room and the departments without wards are they there.

I moved the OR from my orthopedics department from the floor with all the ORs to the ward floor as a test and also assigned all the janitors to new workstations (in this case only because I had accidentally deleted them during the conversion). 2 ORs ran immediately, then it didn't work again and the janitors are all at home again.

I did the same with the cardiology department, but this time I didn't reassign the caretakers.

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Originally posted by GER Dave_Deluxe:

I've noticed that when I'm in the normal on-call room where the doctors are sitting for treatment and the nurses' roles are still active for the operation, EVERYONE is preparing for the operation, not just the ones with the roles.

If you have extra staff in the surgical team and scheduled surgeries in waiting, the extra staff will sit at their desks and already prepare for the next surgery doing nothing else.
But not just the ones with roles is not normal though.

By design, if the clinic is clean, the janitors go home.
But maybe you have an issue with the janitors. If the patients are waiting for a free operating room and they are free, then that's because the operating rooms are not clean. The status message is the same, it indicates the room is unavailable but not the reason, it can be busy or it can be dirty. So the janitors should come back and that seems to be the source of the problem from what you are saying.
Since you already had a problem earlier caused by a workshop item maybe it's the same problem and the mod is still messing up with the files. Try a clean installation of the game.
Occasionally, players report problems with the janitors not cleaning but I never had any problem myself so I believe it's probably mod related.