In a multi-user (client-server) setup, multiple computers work on the same Tally data through a LAN network.
If the network becomes unstable, users may experience:

• Tally freezing or closing suddenly

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• Errors while saving vouchers

• Company not opening

• Data corruption warnings

This guide explains why this happens and how to fix & prevent it.

What Is a Multi-User Data Crash?

Simple meaning:

✔ Tally stops working properly in multi-user mode
✔ Data may not sync correctly
✔ Users may get unexpected errors

It usually affects all users, not just one system.

Why Does This Problem Occur?

Think of LAN like a road connecting computers.

If the road is unstable → data traffic gets disturbed.

Common causes:

• Loose / faulty network cables

• Weak or fluctuating Wi-Fi

• Server computer restarting

• Network switch/router issues

• Power fluctuations

• Heavy network usage

• Antivirus/firewall blocking communication

? Common Symptoms Users Notice

✔ Tally hangs during voucher saving
✔ Sudden “Not Responding”
✔ Company closes unexpectedly
✔ Different data shown on different systems
✔ Data corruption errors

✅ Step-by-Step Solutions

Follow these checks carefully.

1️⃣ Check Server Computer (Most Important)

✔ Is the server PC ON?
✔ Is Tally running on server?
✔ Did server restart unexpectedly?

? Server issues affect all clients

2️⃣ Check Network Stability

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✔ Ensure LAN cables are firmly connected
✔ Avoid damaged cables
✔ Prefer wired LAN over Wi-Fi

? Wi-Fi fluctuations = Common crash reason

3️⃣ Restart Network Devices

✔ Switch OFF router/switch
✔ Wait 10–15 seconds
✔ Turn ON again

✔ Restart server & client systems

4️⃣ Avoid Heavy Work During Instability

If network feels slow/unreliable:

✔ Avoid saving critical vouchers
✔ Pause report generation

? Prevents data mismatch

5️⃣ Check Power Supply

✔ Use UPS for server & switch
✔ Prevent sudden shutdowns

6️⃣ Look for Error Patterns

7️⃣ Temporarily Disable Antivirus / Firewall

✔ Security software may block Tally traffic
✔ Disable briefly for testing

⚠ Re-enable after check

8️⃣ If Data Corruption Appears

? STOP WORKING IMMEDIATELY

✔ Restore latest backup
✔ Use Repair option (with expert help)

⚠ Important Precautions

✔ Never ignore frequent crashes
✔ Never continue working on unstable network
✔ Always take regular backups
✔ Avoid force-closing Tally repeatedly

✅ Best Practices to Prevent Multi-User Crashes

✔ Use Wired LAN (Highly Recommended)

✔ More stable than Wi-Fi
✔ Fewer interruptions

✔ Protect Server With UPS

✔ Prevent sudden shutdown
✔ Protect active data

✔ Maintain Good Network Hardware

✔ Quality cables
✔ Reliable switches
✔ Avoid cheap connectors

✔ Take Daily Backups (Critical Habit)

✔ Lifesaver during crashes
✔ Store in separate drive/cloud

✔ Avoid Overloading Network

✔ Large file transfers → slow Tally
✔ Heavy downloads → lag/crash

✔ Monitor Early Warning Signs

✔ Slow response
✔ Frequent hanging
✔ Random disconnects

? Fix early → Prevent corruption

Short Conclusion

Multi-user crashes are usually network-related, not Tally defects.

✔ Stable LAN + Healthy Server = Smooth Tally
✔ Backups = Ultimate Safety Net

If crashes continue → Consult IT/network professional.