Created map Sync State error

[nsg3]

I have some custom maps I made that I've been attempting to play with my friend. I've searched and for some reason this issue I know there has to be a post about I can't find.

When I play the map in single player, the map works fine.

When I try to play the map with my friend, we always get the sync state error.

One of the maps crashes his game immediately at load. 

Can somebody direct me to the right place please

[badosu]

He does not have the map installed, ask him to see if there's a warning message on top right when he joins a gamesetup with the custom map on.

Also, the tiniest discrepancies on the map code can give you an out of sync error to make sure you have identical maps.

[nsg3]

Thanks, he's not the most computer savvy individual and I have made some changes to the map and reuploaded them to my google drive where he would download them.

I'm guessing he didn't replace the old ones, instead he renamed them with (1) (2) etc