Error Message:
----------------------------------------
Client Library is missing or invalid: C:\Program Files\Firebird\Firebird_3_0\fbclient.dll
Notice, that you have to use 32-bit client library even if you connect to 64-bit version of Firebird/InterBase
because IBExpert is a 32-bit application.
In case you specify a 64-bit version of client library dll instead of 32-bit one you can get this error.
[00544C6B] FIB.FIBError (Line 461, "FIB.pas" + 1) + $2C
[0054003A] FIBDatabase.TFIBDatabase.Open (Line 1053, "FIBDatabase.pas" + 7) + $14
[005181EF] pFIBDatabase.TpFIBDatabase.Open (Line 279, "pFIBDatabase.pas" + 9) + $2
[00540549] FIBDatabase.TFIBDatabase.SetConnected (Line 1185, "FIBDatabase.pas" + 4) + $4
[010DDF12] IBEDatabases.TIBEDatabase.Connect (Line 3221, "IBEDatabases.pas" + 2) + $10
[01067B9A] InspectorFm.TInspectorFrame.OpenDatabase (Line 3347, "Frames\InspectorFm.pas" + 44) + $D
[010629AA] InspectorFm.TInspectorFrame.ObjectsTLDblClick (Line 1314, "Frames\InspectorFm.pas" + 11) + $A
[004555C5] Controls.TControl.DoMouseDown (Line 4306, "Controls.pas" + 2) + $21
[00455681] Controls.TControl.WMLButtonDblClk (Line 4331, "Controls.pas" + 5) + $C
[00444388] Forms.StdWndProc (Line 1459, "Forms.pas" + 8) + $0
[0044DB97] Forms.TApplication.ProcessMessage (Line 6630, "Forms.pas" + 13) + $1
[01123CF2] IBExpert.IBExpert (Line 935, "D:\Projects_5\IBExpert\IBExpert.dpr" + 147) + $7