Hello to everyone, I'm new in this forum. A cordial greeting. My problem is the following. I have an application that works with 32-bit Firebird 2.5.3 and I want it to work with 64-bit Firebird 2.5.3. Well the problem I have is that my database uses some UDFs stored in a dll made in Delphi XE10 Seatle. I have compiled said dll in 64 bits. And the first tests I did were on a server with Windows 7 and another with Windows 10 and they were satisfactory. The 64-bit Firebird loaded the UDFs without problems...