New Construction Options

"New Construction Options", the sound generated by C&C if there are new construction options available, is usually only mentioned because it doesn't work as intended.

The Bug

The sound gained sad fame by the fact that there's a bug resulting in this sound being repeated everytime there is a creation (or similar action) performed, e.g.

Unit created.
New construction options.
Unit created.
New construction options.
Unit created.
New construction options.
New construction options.
New construction options.
Technology stolen.
New construction options.
New construction options.
Unit created.
New construction options.

...etc.

DCoder also reported: That's not the only problem with the NCO bug... At least to me.. when I hear "New Construction Options", my sidebar jumps to a random position (up or down). Gad damn annoying.

Solutions

CannisRabidus: Check for typos. You might just think you have all countries listed...
ArgCmdr: Owner parameters on side-buildings should contain all playable houses, else that sound is played.
Renegade: Well, from my rich funds of experience with this god-damned bug, I can only give one advice: Just disable that freakin' sound...you won't hunt it down...and even if you did, it will come again...and again...it's everywhere......you can't escape from it...disabling it makes modding much more funny, since you don't need to fuckin' care about it...

eva(md).ini, [EVA_NewConstructionOptions], make it look like this:

[EVA_NewConstructionOptions]
Text=New construction options.
Russian= ;csof049
Allied=; ceva049
Yuri= ;cyur049
Type= QUEUE
Priority= LOW

Reportedly, TechLevel= typos generate the bug as well.

This bug is usually referred to as the "NCO-Bug".