CM2 shows 3124 errors as:
Error: Attachment point attachment (a.smoke29) in 'smoke29' was not found.
Error: The Tag 'fonts-0' is not permitted within a container of type 'traincar'.
Fix:
Open the kuid for Edit in Explorer and edit the config.txt file to remove the unneeded line:
fonts-0
Using PEV's Mesh-Text-Viewer I see the attachment point is entered as a.smoke29l.  So, in the config.txt file, smoke29 container, add an l (thats the letter ell) after the 9 so it looks like this:
 
smoke29
{
  attachment                            "a.smoke29l"
 
then save and commit.
 
The only error in 2125 is the fonts-0 tag.  Remove it to fix it.
 
Bob