[Urgent] Visa Field-34 Packager?

[adnaan...@gmail.com]

Hello Guys,

Can anyone help me in configuring the right packager for Visa Field-34? This field is a variable length field with a 2-byte length field.

[chhil]

The definition in the spec is

2 bytes, binary 1535 bytes, variable by usage, maximum 1537 bytes

We use             class="org.jpos.iso.IFB_LLLLHBINARY"

-chhil

On Thu, Mar 13, 2025 at 12:31 AM adnaan...@gmail.com <adnaan...@gmail.com> wrote:

Hello Guys,

Can anyone help me in configuring the right packager for Visa Field-34? This field is a variable length field with a 2-byte length field.

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[adnaan...@gmail.com]

When I used the packager you mentioned i.e. org.jpos.iso.IFB_LLLLHBINARY , it gives me ClassNotFoundException.

[Mark Salter]

Did you try and search the source repository?

Try one less L in the name?

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Mark

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[adnaan...@gmail.com]

I have already tried org.jpos.iso.IFB_LLLHBINARY but it doesn't by Visa's variable length fields containing 2-byte length like Field-34 & Field-104.

[Mark Salter]

I am not sure what you mean?

Why is it not working for you?  Any stacktrace or message(s) given?

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[chhil]

Apologies LLLL is a custom one , which is identical to LLL one. It was simply created for clarity as hex work with even number one, jpos LLL works too.

https://github.com/jpos/jPOS/blob/tail/jpos/src/main/java/org/jpos/iso/IFB_LLLHBINARY.java

Just noticed the comment in my code

 * Binary field that has 2 byte binary length header. Since its binary 2
 * bytes LL become LLLL and can store upto 0xFF 0xFF length which is
 * decimal 65535. This is no different from IFB_LLLHBINARY as its still
 * 2 bytes and since jpos does not do nibble level calculation, it
 * accepts FFFF instead of 0FFFF for LLL.
 * Added this just to make it easier for a dev to add instead of looking
 * for a 4 L definition.

-chhil

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[chhil]

For visa we use the jpos vapchannel that handles the visa  header. Are you using the vapchannel?
If you have a hexdump of the message you can share it here and I can take a look at it.
You can also share your packager.