# Error While Retrieving or Modifying Bill .

**YouTube:** [ERROR WHILE RETRIEVING OR MODFIYING BILL](https://www.youtube.com/watch?v=aSTc8YH2EUk\&t=11s)

## ERROR WHILE RETRIEVING OR MODFIYING BILL

This tutorial demonstrates how to resolve the **"unexpected error while opening the last bill"** issue that may occur during bill retrieval or modification.

***

### Overview of the Issue

* The error occurs when attempting to retrieve or modify a previous bill in the **Sale Bill** window.
* This is typically caused by:
  * A **corrupt database**
  * **Improper system shutdown**

***

### Steps to Reproduce the Error

1. Navigate to the **Billing Menu** from the **Main Menu**.
2. Click on **Sale Bill**.
3. Press "**Alt + Insert"** to retrieve the previous bill.
4. Observe the error:

   > “Unexpected error while opening last bill”.

<figure><img src="/files/U4ZNELuLEdeaieY1TYws" alt=""><figcaption></figcaption></figure>

***

### How to Fix the Error

* **Close the Logic ERP software** completely.
* Go to the **Taskbar** and open **Logic Update Manager**.
* Click on the **Options** button.
* Select your company from the list.
* Click on **Run Database Patches** located at the bottom-right corner.

<figure><img src="/files/1t5vSCpvhw7gfUuCojMq" alt=""><figcaption></figcaption></figure>

* Wait for approximately **10–15 minutes** for the patch process to complete.
* A confirmation message will appear once the execution is done.
* Close the **Logic Update Manager**.
* Reopen **Logic ERP** and try retrieving the bill again.
* The bill should now be **retrieved successfully**, and the error will no longer appear.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://kb.logicerp.com/logic-erp-installation-configuration-and-troubleshooting-solutions/troubleshooting/sales/error-while-retrieving-or-modifying-bill-..md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.