database has errors (artwork generation)

Hi guys,

When im generating athe artwork/gerber files with the check database before artwork option checked. i get six similar errors. the error as shown in the log file is

ERROR IN BRANCH name = SA

  ERROR(SPMHUT-17): Schedule contains an illegal disconnected branch.

NET may have lost connections. Check for missing connections. 

i dont know how to deal with this really. i looked at the etch connection on the board and it seems to be fine.

i updated DRC and no errors found. all 6 errors are the same just different brance name.  Any ideas? 

also if i run the artwork without "check database before artwork checked" will this be ok? 

Regards

Fran