yaml2ck converting format error with third body reaction

[knkwon1]

Please bear with my poor English.

Recently, I used new feature yaml2ck to convert Cantera mechanism to Chemkin.
yaml2ck is working fine, but error occurred when I use converted mechanism file with Chemkin.
As shown in below, reactions that have notified third body make error with efficiency.
If I remove error line, it works fine with Chemkin.
Probably, it related with output format from yaml2ck.

I know it is not released feature,
But I hope it will be helpful before releasing it.

Some lines from converted mechanism file

H2O + M <=> H + OH + M 6.100000000000001e+27 -3.322 120790.0
H2/3.000E+00/ H2O/0.000E+00/ N2/2.000E+00/ O2/1.500E+00/
H2O + H2O <=> H + OH + H2O 1.0060000000000001e+26 -2.44 120180.0
H2O/1.000E+00/ ### <-- this line makes an error ###

some lines from chemkin validation error

11. H2O+M<=>H+OH+M 6.10E+27 -3.3 120790.0
    H2 Enhanced by 3.000E+00
    H2O Enhanced by 0.000E+00
    N2 Enhanced by 2.000E+00
    O2 Enhanced by 1.500E+00
12. H2O+H2O<=>H+OH+H2O 1.01E+26 -2.4 120180.0
    Error...3rd-body requires (+M) in reaction...H2O/1.000E+00/
    H2O Enhanced by 1.000E+00

System information

• Cantera version: main : commit 7d86e26
• OS: Windows 10
• Python 3.9
• Chemkin 2022 R2

[ischoegl]

@knkwon1 ... thank you for reporting this issue.