Trying Delphi 10.2 Tokyo with Paradox FireDAC ODBC on Windows 10 throws error ?Could not open Paradox.net. This link describes the problem: https://msdn.microsoft.com/en-us/library/bb221383(v=office.12).aspx
An Embarcadero FireDAC ODBC connection to Paradox table, by default will set ParadoxNetPath to System32 folder:
ODBCAdvanced=CollatingSequence=ASCII;DefaultDir=C:DEVTPDEMOSDATA;DriverId=538;MaxBufferSize=2048;MaxScanRows=8;PageTimeout=600;ParadoxNetPath=C:Windowssystem32;ParadoxNetStyle=4.x;ParadoxUserName=admin;SafeTransactions=0;Threads=3;UserCommitSync=Yes
There may be no write rights to that folder. An easy solution is to try to set it to some place where user has read/write rights. Eg. Temp folder.
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