Ubuntu – Packet Tracer Segmentation Fault Ubuntu 18.04

18.04ciscolibrariesnetworking

I have installed Cisco Packet Tracer 7.1.1 on Ubuntu 18.04. Every time I launch the application it closes and give me a message Segmentation fault (core dumped).
Using the gdb, I went to the installation directory /opt/pt/bin and I typed the following commands:

$gdb Packettracer
$gdb > run
$gdb > where

Which reports a problem with libpng and libcrypto.so.1.0.0

Warning: libpng warning: iCCP: known incorrect sRGB profile
Warning: libpng warning: iCCP: known incorrect sRGB profile

Thread 1 "PacketTracer7" received signal SIGSEGV, Segmentation fault.
0x00007ffff79f49a7 in CRYPTO_add_lock () from /usr/lib/x86_64-linux- gnu/libcrypto.so.1.0.0

How can i fix this?

Best Answer

It seems to be a problem in the PacketTracer implementation.

I had the same issue here, but I solved the problem using the previous version of Packet Tracer (7.0). The Packet Tracer 7.0 is available at the Netacad portal.

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Ubuntu – I can’t run Cisco packet tracer 7.1 on Ubuntu

It seems that you are using CPT 7.1 on Ubuntu 16.04 LTS.

I have found a nice guide to run CPT.

Steps:

Install CPT as you have already done.

Download correct version of library libicu52 (for example for amd64)

cd /tmp
wget http://mirrors.kernel.org/ubuntu/pool/main/i/icu/libicu52_52.1-3ubuntu0.8_amd64.deb
sudo dpkg -i libicu52_52.1-3ubuntu0.8_amd64.deb

3 . Launch CPT with the packettracer.

Update: this procedure works with CPT 7.1.1 too.

Ubuntu – Packet Tracer 7.1.1 crashes on startup, Xubuntu 18.04

It seems that you have missed some dependencies, you can install them with:

sudo apt-get install libqt5webkit5 libqt5multimedia5 \
libqt5xml5 libqt5script5 libqt5scripttools5

Also you can try the method from my other answer for 16.04 LTS:

cd /tmp
wget http://mirrors.kernel.org/ubuntu/pool/main/i/icu/libicu52_52.1-3ubuntu0.8_amd64.deb
sudo dpkg -i libicu52_52.1-3ubuntu0.8_amd64.deb

But even after these actions sometimes it really crashes with Segmentation fault (core dumped) even if launched directly with /opt/pt/bin/PacketTracer7.

See this question with great idea of running it from GDB. The problem comes from some code in CPT, which is linked to LibSSL.

As it is proprietary software, you should ask Cisco for support and/or special deb-package for Ubuntu 18.04 LTS.

Best Answer

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Ubuntu – I can’t run Cisco packet tracer 7.1 on Ubuntu

Ubuntu – Packet Tracer 7.1.1 crashes on startup, Xubuntu 18.04

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