Curve driven pattern flips to other side in assembly.

Hello,

when I did curve driven pattern it flips after line turns into arc.

I did this many times before and it never did that. Does anyone know what's wrong?

Thanks for reply.

EDITED BY MODERATOR: Title changed and moved to assemblies space. Please use a brief title that describes the issue so users can understand the issue without drilling down into it. Original title: "Why is this happening?" Also, please post in the appropriate space when one is available instead of general.

SolidworksAssemblies