Error 440 Automation Error: modupsShell.ExecuteCustomScriptEx

Question

We are experiencing the following error when trying to load data files to FDM using the batch processing functionality. If no files are present in the OpenBatch folder, no error occurs. However, the attached occurs once files are present.
The process has worked fine previously, but has been giving the following errors since last night.
** Begin Runtime Error Log Entry [2012-09-20 10:47:38] **
ERROR:
Code............ 440
Description..... Automation error
At Line: 36
Procedure....... modupsShell.ExecuteCustomScriptEx
Component....... upsShell
Version......... 1112
Process ID...... 2508
Thread.......... 6852
IDENTIFICATION:
User............ admin
Domain..........
Computer Name... *******
App Name........ *******
PROCEDURE STEPS:
1-Split Arguments
2-Create Load balancer=*******
3-Authenticate
4-Get Next App Server
5-Open App Server=*******
6-Execute the script=*******_BATCHLOAD
7-Step was not reached, a previous step failed

Answer 1

Of course, apologies. Please see below.
Looking at the script in Workbench, the error appears to be referring to the following line:
BATCHENG.mFileCollectionProcess BATCHENG.PcolFiles, CLng(lngProcessLevel), , CBool(blnAutoMapCorrect)
Script:
Sub *******_BATCHLOAD()
'FDM CUSTOM Script:
'Created By:      *******
'Date Created:      18/05/2012 11:58:37
'Purpose:     Execute a Batch Loader task.
'Execute a STANDARD batch
'Use Serial Processing
'Declare Local Variables
Dim lngProcessLevel
Dim strDelimiter
Dim blnAutoMapCorrect
Dim BATCHENG
'Initialize batch engine
Set BATCHENG = CreateObject("upsWBatchLoaderDM.clsBatchLoader")
BATCHENG.mInitialize API, SCRIPTENG
'Initialize Variables
lngProcessLevel = 12 'Up-To-Check
strDelimiter = "~"
blnAutoMapCorrect = 0
'Create the file collection
Set BATCHENG.PcolFiles = BATCHENG.fFileCollectionCreate(CStr(strDelimiter))
'Execute a Standard Serial batch
BATCHENG.mFileCollectionProcess BATCHENG.PcolFiles, CLng(lngProcessLevel), , CBool(blnAutoMapCorrect)
End Sub