Peresoft Software

Solution Sheet

Version 2026 · EFTXpress · Posted 20 May 2026

Duplicate File Sequence Number Error When Posting EFT

When posting an EFT batch with SFTP enabled, the post fails with "Duplicate file sequence number". This typically occurs after a backup restore resets the sequence number.

Back to Solution Center

The File Sequence Number is a unique serial number for EFT transaction files. It starts at 0 and increments each time an EFT batch is successfully posted or the Regenerate function is run.

Common causes:

Restoring a backup resets the File Sequence Number back to 0, causing a duplicate when the bank already has a higher number on record.
For some formats the number resets when the session date changes.

Resolution:

Contact your bank to obtain the last used File Sequence Number.
In Cashbook, go to C/B Setup | Setup EFTXpress Banks | File Setup tab.
Edit the Current File Sequence Number to the correct value. Cashbook will display a warning before allowing the change.
Repost the EFT batch.

More Solution Sheets

2026 · EFTXpress

SOL-0112026

Bank Details Not Approved - EFT Authorisations

When posting an EFT batch you receive an error that bank details have not been approved. From version 2026, EFT banking details must be approved in Miscellaneous Codes before a payment can be entered.

SOL-0182026

Batch Created as Normal Instead of EFT - Cannot Create EFT File

A batch has been created as a Normal batch type even though all entries are EFT entries, and the EFT file cannot be generated.

SOL-0152026

Cannot Print Cheque for EFT Batch - Print Button Disabled

From version 2024, cheque printing is no longer available for EFT batches. Only advice printing is supported.

SOL-0052026

Connecting Rebex for SFTP

Rebex is a secure SFTP and SSH server for Windows, free for non-commercial use. It can be used to set up your own internal SFTP server for testing EFTXpress SFTP connections before connecting to your bank's SFTP server.

SOL-0062026

Creating SFTP Keys

SSH keys are required when using SFTP with Key File or SFTP with 2-Factor Authentication in EFTXpress. Keys are generated using the Windows command prompt.

SOL-0122026

EFT Miscellaneous Codes Details Not Updating in Batch

EFT Miscellaneous Code details are not updating in the Cashbook batch. The behaviour differs between versions 2024/2025 and 2026.

SOL-0132026

EFT Miscellaneous Codes Workflow Approval - Version 2026

From version 2026, changes to key fields in EFT Miscellaneous Codes require authorisation. All changes are written to the EFT Audit Table.

SOL-0092026

EFTXpress - Format Drill Down

You can drill down into any EFTXpress bank format to view the full specification, including which fields are used and what values are required by your bank.

Dealer Login

Client Login