operation cannot be performed on inactive dataset lazarus / 16-Databases ---------------------------------------------------------------------- azizi_lazard1988 · 2016-12-13 12:41 hello friends i have this problem when i run application in my pc , the application excuted fine in other pc this is the show of my error ---------------------------------------------------------------------- Thaddy · 2016-12-13 12:46 Simple sourcecode, versions of FPC, Lazarus? Is the database present and/or created? ---------------------------------------------------------------------- azizi_lazard1988 · 2016-12-13 12:55 i think i fixed problem by changing  the active dataset to :true in inspector object and i got new error   this is the showof error ---------------------------------------------------------------------- azizi_lazard1988 · 2016-12-13 13:02 i think the problem is not fixed when i change ative dataset to true its same problem  innactive dataset