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need to install libpng12 as Ephesoft dependency

Question asked by arm on Jun 14, 2017
Latest reply on Jun 20, 2017 by arm

hi, im trying to install libpng12 in ubuntu 16 to keep on my ephesoft´s installation.

but im having this problem when decompact with dpkg -i: 

dpkg -i libpng12-dev_1.2.54-1ubuntu1_amd64.deb 
dpkg: regarding libpng12-dev_1.2.54-1ubuntu1_amd64.deb containing libpng12-dev:amd64:
libpng12-dev conflicts with libpng-dev
libpng-dev:amd64 (version 1.6.25-1) is present and installed.

dpkg: error processing archive libpng12-dev_1.2.54-1ubuntu1_amd64.deb (--install):
conflicting packages - not installing libpng12-dev:amd64
Errors were encountered while processing:

I´ve deleted already libpng-dev, but still


then i tried ar x

ar x libpng12-dev_1.2.54-1ubuntu1_amd64.deb


i got it: control control.tar.gz data.tar.xz debian-binary libpng12-dev_1.2.54-1ubuntu1_amd64.deb md5sums


but when try to run the ./ files such as control, im having this problem:

./md5sums: line 1: b1dd957f1d852ea214975859fe9a145e: command not found
./md5sums: line 2: 71d3fb8fa85290e40b3b33b68fb71126: command not found
./md5sums: line 3: cc760663ba0e674024b12f349b26abd5: command not found
./md5sums: line 4: f7bb4ca6bcb10fad0a55b0fdd53f405c: command not found
./md5sums: line 5: 6013989611a416cc01a9fc3f4956234a: command not found
./md5sums: line 6: 3cf0b6cc5304828a927b3cb62a46204d: command not found
./md5sums: line 7: 5b609d09fdb2e93dc09224c2fa6d7b06: command not found
./md5sums: line 8: 87ed3a7c33970a37ed21cd1698683fc0: command not found
./md5sums: line 9: a7ce40defa98d48b8edf102bfdcf83ed: command not found
./md5sums: line 10: a341c0e2680be61ade3047c44e1dd061: command not found
./md5sums: line 11: a84881304cfe900d3eb6a3b770578bb7: command not found
./md5sums: line 12: c1b3f6726ac40f55e8514d518bd86399: command not found
root@ubuntu:~/Libpng# ./control
./control: line 1: Package:: command not found
./control: line 2: Source:: command not found
./control: line 3: Version:: command not found
./control: line 4: Architecture:: command not found
./control: line 5: syntax error near unexpected token `newline'
./control: line 5: `Maintainer: Ubuntu Developers <>'


I need to have libpng12-dev properly installed cause my ephesoft installation is failling, as follow:


Checking for Internet connection. Please wait...
Updating the package list from repository, please wait...
Ephesoft application already exists at /opt/Ephesoft path.
SharedFolders already exists at /opt/Ephesoft/SharedFolders path.
Installing/Updating "libpng12-dev" for Ephesoft.
E: Package 'libpng12-dev' has no installation candidate
Error occurred while installing "libpng12-dev"
Exiting from script...


could you guyz plz help me, cause i dont know what to do.....