Running Excel Macro in Batch File

If all you are wanting to do is a text replace, you do not need Excel.

untested

strSource = "f:\a\axys3\users\brandon\test.txt"
strDest = "C:\Users\btoney\Desktop\IMRF\test.txt"
strFind = "causcash"
strReplace = "USD Curncy"
Set inputFile = CreateObject("Scripting.FileSystemObject").OpenTextFile(strSource, 1)
strInputFile = inputFile.ReadAll
inputFile.Close
Set inputFile = Nothing
Set outputFile = CreateObject("Scripting.FileSystemObject").OpenTextFile(strDest, 2, True)
outputFile.Write Replace(strInputFile, strFind, strReplace)
outputFile.Close
Set outputFile = Nothing