When using the script task in ibaDatCoordinator, you have to use a placeholder instead of the DAT file name to be able to access the last DAT file:

ibaAnalyzer.exe %f [pdofilename] [/switch]

%f: Last DAT file, complete path and file name (e.g. d:\dat\pda001.dat)

%g: Last DAT file, only file name (e.g. pda001.dat)

%h: Last DAT file, file name without suffix (e.g. . pda001)

Other documentation
	Further information can be found in the documentation for ibaDatCoordinator.