Bug: Incompatibility with ERPNext v15.102+ causing tax calculation crash

[messam10]

Description

After updating ERPNext to v15.102+ / v15.103, the app Round-Tax-Amount-Row-wise causes a frontend crash when saving Sales/Purchase Invoices.
The issue appears during tax calculation in taxes_and_totals.js.

Error Logs

tax_amount: could not find docfield in method precision()

TypeError: number 240 is not iterable (cannot read property Symbol(Symbol.iterator))
    at taxes_and_totals.js:372:52

[alaa-alsalehi]

@messam10 did you try to do an invoice without ZATCA integration

[messam10]

@alaa-alsalehi
I have commented out the custom hook override

The issue was caused by a conflict between this override and recent changes introduced in ERPNext’s tax rounding logic

Frappe updated the tax calculation and rounding behavior about a month ago in the core file:
https://github.com/frappe/erpnext/blob/version-15/erpnext/public/js/controllers/taxes_and_totals.js

The custom override was based on the older implementation, which led to errors such as:

• precision("tax_amount") failing
• Incorrect return structure from get_current_tax_amount
• Runtime errors during tax calculation

After disabling the override, it's works

[alaa-alsalehi]

@messam10 fixed check and give me feedback