Is there a way to pass parameters “by name” (and not by order) to a batch .bat file?

Yeah you could do something like that though I don’t think you can use “=” as a token delimiter. You could use say a colon “:”, somebatchfile.bat "SOURC:originalFile.txt" "TARGET:newFile.txt". Here is an example of how you might split the tokens:

@echo off

set foo=%1
echo input: %foo%

for /f "tokens=1,2 delims=:" %%a in ("%foo%") do set name=%%a & set val=%%b

echo name:  %name%
echo value: %val%

Running this would produce this:

C:\>test.bat SOURC:originalFile.txt
input: SOURC:originalFile.txt
name:  SOURC
value: originalFile.txt

[Edit]

Ok, maybe it was too close to bed time for me last night but looking again this morning, you can do this:

@echo off

set %1
set %2

echo source: %SOURCE%
echo target: %TARGET%

Which would produce this (note that I reversed the source and target on the command line to show they are set and retrieved correctly):

C:\>test.bat "TARGET=newFile.txt" "SOURCE=originalFile.txt"
source: originalFile.txt
target: newFile.txt

Note that %1 and %2 are evaluated before the set so these do get set as environment variables. They must however be quoted on the command line.