Log4OM

1. What is the maximal no of qsos in one database
2. if you have several databases, how can the programme always search for previous qsos covering all databases

Which kind of Database you mean ? There´s a difference between .sqlite database and MySql database.
Think at MySQL it´s nearly endless and .sqlite i think it was around 120k of contacts. Not shure about this
but this was what i have in my memory.