TDS Return

This query is : Resolved

Vidya (Querist)
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25 September 2009 Dear Sir,

I have downloaded the latest version of FVU 2.128 from TIN NSDL site.

After preparing TDS Return using e-TDS RPU Version 1.7 when I validate the .txt file and .csi file in the latest version (2.128) there is an error message displayed "T-FV-1000 Invalid File Header Record Length"

Kindly suggest how to rectify this error. Kindly provide the solution at the earliest.

Immediate action will be highly appreciated.

Thanks,
Vidya

bharat kumar

bharat kumar (Expert)
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25 September 2009 This indicates that there is error in the data typed by you please recheck all the datas

CA CHINTAN AJMERA

CA CHINTAN AJMERA (Expert)
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25 September 2009 Agree

CA Suresh Choudhary

CA Suresh Choudhary (Expert)
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25 September 2009 agree

Vidya

Vidya (Querist)
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29 September 2009 Dear Sir,

I was using previously downloaded RPU for preparing e-tds return and validating the files generated through this RPU in the latest FVU version 2.128 and i was receiving error message "T-FV-1000 Invalid File Header Record Length".

Is there any change in RPU version 1.7 please inform should I download the RPU version 1.7 again and then try validating through FVU 2.128 to rectify this error?

Please inform at the earliest.

Thanks,
Vidya

Aashok Kumar Sharma

Aashok Kumar Sharma (Expert)
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28 July 2025 Hi Vidya,

The error **"T-FV-1000 Invalid File Header Record Length"** usually happens because the version of the Return Preparation Utility (RPU) used to generate the return file is **not compatible** with the latest version of the File Validation Utility (FVU).

### What to do:

1. **Use Compatible Versions:**

* When using FVU version 2.128, you need to ensure that your RPU is also the latest version compatible with that FVU.
* RPU version 1.7 is likely outdated for FVU 2.128.

2. **Download Latest RPU:**

* Visit the official NSDL TIN website: [https://www.tin-nsdl.com](https://www.tin-nsdl.com)
* Go to the TDS -> Downloads section.
* Download the latest version of the RPU that matches FVU 2.128.
* Prepare your TDS return file using this latest RPU version.

3. **Re-generate the Return File:**

* Using the updated RPU, prepare the .txt and .csi files afresh.
* Validate these files again using FVU 2.128.
* This should remove the "Invalid File Header Record Length" error.

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### Why this happens:

* File header structure or length definitions sometimes get updated in the latest FVU.
* Older RPU versions generate files with old header structures that newer FVU versions reject.

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If you want, I can help you find the correct download links or guide you step-by-step to update the RPU and fix this error. Just let me know!

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