Quartus 15.1 requires libpng12 ?

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very fast one..try do a search for libpng12.so.0 see if this files present.

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Not present. I do have :

libpng14.so.14 -> libpng14.so.14.12.0*

libpng.so.14 -> libpng14.so.14*

libpng.so -> libpng16.so*

libpng16.so.16 -> libpng16.so.16.19.0*

libpng.la -> libpng16.la*

libpng16.so -> libpng16.so.16.19.0*

Making a link to to libpng12.so.0 from libpng14.so.14.12.0

results in :

quartus: /usr/lib64/libpng12.so.0: version `PNG12_0' not found (required by /opt/altera_lite/15.1/quartus/linux64/libQtGui.so.4)

http://www.digitalsolutionslab.com/installing-quartus-ii-v-13-1-64-bit-on-rhelcentos-6-64-bit/

this page might helps , as additional thing need to be done for 64 bit quartus II installation during in 13.1. probably this still appies in 15.1..

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Is this a Ubuntu or cent os?

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Slackware 14.1+ 64-bit

Thanks for the link !

no offend, but the supported Linux version quite limited as well for quartus, where other than the listed below might face some unpredictable errors.. extra effort needed to solve all those untested OS. :D

http://dl.altera.com/requirements/15.1/

I frequently have similar issues with shared objects on my CentOS servers. Running the following command fixes many of them:

export LD_LIBRARY_PATH=/opt/Altera/altera15.1/quartus/linux64 # point to your quartus installation

/opt/Altera/altera15.1/quartus/bin/quartus_sh --64bit -gui & # open Quartus GUI

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I frequently have similar issues with shared objects on my CentOS servers. Running the following command fixes many of them:

export LD_LIBRARY_PATH=/opt/Altera/altera15.1/quartus/linux64 # point to your quartus installation

/opt/Altera/altera15.1/quartus/bin/quartus_sh --64bit -gui & # open Quartus GUI

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thanks for sharing, and the environment path also contribute to this error messages. !

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I frequently have similar issues with shared objects on my CentOS servers. Running the following command fixes many of them:

export LD_LIBRARY_PATH=/opt/Altera/altera15.1/quartus/linux64 # point to your quartus installation

/opt/Altera/altera15.1/quartus/bin/quartus_sh --64bit -gui & # open Quartus GUI

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Thanks for sharing this.

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Slackware 14.1+ 64-bit

Thanks for the link !

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I have to say in order to reduce more incompatibility issue that may raise in your development, It is better you consider to be in Altera supported OS.