I pulled the 3.91 release immediately I saw posts in the forum.
They show critical issues so I reverted back to 3.90 as default release.
The problem lay with Java 1.8 JRE run-time and mainly affects reports.
I take the view that what goes in eventually needs to come out as reporting is such a crucial function of uniCenta oPOS
Aim is to resolve this as quick as possible and push out a new release before the weekend is over.
Jack
Founder uniCenta