Hello
You have some other mistakes in your files
1: you need to add the keyword NUMBER OF CULVERTS =1
2: you've missed a1 in the last but one column of the third line
3: you've missed a space between 1. and 5.
this is a version that works well:
RELAXATION, NUMBER OF CULVERTS
0.2 1
I1 I2 d1 d2 Ce1 Ce2 Cs1 Cs2 S12 L12 z1 z2 a1 a2
155 101 90. 90. 0.5 0.5 1. 1. 5. 0.2 0.3 0.1 0. 90.
So check the meaning of each term and adapt their values.
With my best regards
Riadh