Got it sorted. The autopilot A,B,AB switch has to be in the A or B position. Captain Sim moved it to AB for the new version 2.6 and I didn't catch it. (I read the post about it, just didn't register until now.)  So, two independent civa's can work.
This was just a test. Two cdu's pull the frame rates down. Sticking with one is probably the best choice. However, I would like to see the 3d cdu's integrated into the panel like the L-1011.

This is a single cdu version:

[Window0X]
Background_color=0,0,0
size_mm=180,328
window_size_ratio=1.000 
position=8
visible=0
ident=11041
type=special

gauge00=../civa/INS!Cdu1,  0,138,180,190
gauge01=../civa/INS!Msu1,  0,70,180,68
gauge02=../civa/INS!NavModeSingle,  145,0,35,70
//ins bottom right

I have extra time this week to mess with stuff. Captain Sim's v2.6 ins works fine. I just wanted to understand the ins thing a little better. Again, this is just the stock v1.51.

My wishes:
I had like the window to appear on the screen upper left corner. (This I can do myself.)
More important, at least for me, the possibility to call this window from the icone panel. Til now my attempts remain unsuccesfull.

Sorry to say that but none of your proposals is working.

Here is my contribution.
//--------------------------------------------------------
[Window01]
Background_color=0,0,0
size_mm=36,190                             //168
window_size_ratio=1.000 
position=7
visible=1
ident=11101
render_3d_window=0
window_size= 0.035, 0.292
window_pos= 0.000,0.722                            //0.750
zorder=99
type=special

gauge00=Captain_Sim.p722.tools!icons,  0,0,36,168
gauge01=../Civa/Ins!MsuPanelIconL,     0,168,18,22,11041
gauge02=../Civa/Ins!CduPanelIconL,    18,168,18,22,11041

Both icones open the window but I didn't give the gauges a try yet. (too warm for my PC)
Later on I wish to create a new window window 11 calling the MSU window 12 calling the CDU.
W'ill see what happens.

Delco Carousel IV-A Civa: Version2 - a simple as it gets two window install. Supersedes all previous post.

Add:

[Window Titles]
Window0?=CIVA INS
Window0?=CIVA DUAL INS



Replace window01 with the modified window01 below to add icons: shift2

[Window01]
Background_color=0,0,0
size_mm=36,190 //---------
window_pos= 0.000, 0.750
visible=1
render_3d_window=0
zorder=99
ident=11101
type=special

gauge00=Captain_Sim.p721.tools!icons,  0,22,36,168
gauge01=../Civa/Ins!CduPanelIcon,     0,0,18,22,11040 //--------- single
gauge02=../Civa/Ins!MsuPanelIcon,    18,0,18,22,11041 //--------- dual



Add:

[Window0?] //single CDU
Background_color=0,0,0
size_mm=180,328
window_size_ratio=1.000 
position=8
visible=0
ident=11040 //11004
type=special

gauge00=../civa/INS!Cdu1,  0,138,180,190
gauge01=../civa/INS!Msu1,  0,70,180,68
gauge02=../civa/INS!NavModeSingle,  145,0,35,70

[Window0?] //Dual CDU
Background_color=0,0,0
size_mm=360,328
window_size_ratio=1.000 
position=8
visible=0
ident=11041
type=special

gauge00=../civa/INS!Msu1,  0,70,180,68
gauge01=../civa/INS!Cdu1,  0,138,180,190
gauge02=../Civa/Ins!NavModeDual,  300,0,60,70
gauge03=../Civa/Ins!Msu2,  180,70,180,68
gauge04=../Civa/Ins!Cdu2,  180,138,180,190

Add:

[Vcockpit01]
gauge36=../civa/INS!Config,  0,0,0,0,CS727


If you use the Delco Carousel IV-A Civa, you might want to comment out the original Window06 and rename the Civa gauge in the panel folder.

I'm not telling you to, i'm just say'in...


This is as simple as it gets. I have both cdu's on all of my 727's. - Read the Delco Carousel Doc's

Kyprianos,
Your observation of the Accuracy Index is correct. I found I had the same result as it went to 9 after thirty minutes of flight.
I added the update flags gauge, to check dme and both green flags appeared by pressing the test button. It didn't make a difference having it.

gauge05=../Civa/Ins!UpdateFlags,  130,0,100,70

I loaded both CDU's with duplicate waypoints. I went back and forth between Seattle Ksea and Bowerman Khqm. After thirty minutes I had to change waypoint, insert twice to get the correct heading established.
I noticed there was a 0.5NM difference between cdu1 and cdu2. I never had any action or malfunction codes.
I followed the Operations Manual Chapter 4: Normal Procedures.
I'll search over at simufly.com and look for an answer. Don

I do this as I should the proper way.
When DMEs update all is fine.
The problem is that the number of misalignment goes up fast when NOT updating.

Updated the dme successfully. Green flag came on and the cdu reset itself to 1.