Error: Too many I/O Variable

Error: Too many I/O Variable

I have an issue compiling my project. It shows an error: Too many I/O Variable. 
I tried the suggestion from the other forum discussion by doing this:
Settings > General > Complex variables in a separate segment > Yes
But logic service still prompted error.

I have checked my license and it is unlimited tags, unlimited variables. 
I also checked in the license manager and already activated logic service component.

I am not sure how to resolve.