Associated string not in the same direction as the reference string

Hello, 

I am working in MX Road SS4. I have a model with reference string and and associated string. But while generating Profiles, I get the error that "Associated string not in the same direction as the reference string" and the string does not get added in the profile box. The associated string is in the same direction as the reference string. Even by using the reverse string option, the same error persists. What could be the possible reason.

Attached file shows the point number of associated string in the same direction / increasing order of the reference string.