JAN ERP V3.1 — Company → Order → Delivery → Invoice

This update enforces the operational sales flow requested for JAN Enterprises.

New workflow

1. Create the customer in Company Master.
2. Create the Sales Order only against that existing active company.
3. Create a Delivery Challan.
4. Open the Delivery Challan and click Mark Delivered & Generate Invoice.
5. The ERP marks the Sales Order completed and automatically generates the invoice using the configured GST defaults and the company's credit period.

Important controls

• Manual and popup orders reject unknown/inactive companies.
• Bulk Order Upload no longer auto-creates unknown companies; those rows are flagged/skipped.
• Invoice creation is locked until delivery is confirmed.
• Existing completed/invoiced historical records remain usable after the browser upgrade.

Installation

1. Back up your files and MySQL database.
2. Upload this ZIP to /home2/doctorlabs/public_html/jan.doctorlabs.in.
3. Extract and overwrite existing files.
4. Login as Full Admin.
5. Open https://jan.doctorlabs.in/upgrade_v3_1.php.
6. Click Run V3.1 Upgrade.
7. After success, test with one company → order → challan → delivery → invoice.

No config.php is included. Existing DB credentials are not overwritten.