Zero 'Total Float' on an activity that has no critical sucessors

Member for

12 years 5 months

You're right with the calendars, sub contract activities are a 5 day week and all of our succeeding activities were on 6 days ... thanks very much for your help!

Member for

24 years 8 months

Abble,

It may happen if succeding activities have different calendar (like 6 days work week instead of five).

Member for

12 years 9 months

I think you better post the xer file so everybody can see what's going on inside your program. Just saying. It might help better understand your problem. I never meet such problem before. But let's wait these P6 masters arround will suggest.