EPS to PDF: BoundingBox not found

adila@adila:~/Desktop/multichannel-RPL/ICC2015/font-experiments$ epstopdf single_channel.pdf
==> Warning: BoundingBox not found

adila@adila:~/Desktop/multichannel-RPL/ICC2015/font-experiments$ epstool --copy --bbox single_channel.eps --output single_channel1.eps
The program 'epstool' is currently not installed. You can install it by typing:
sudo apt-get install epstool

adila@adila:~/Desktop/multichannel-RPL/ICC2015/font-experiments$ sudo apt-get install epstool
.
.
.
.
adila@adila:~/Desktop/multichannel-RPL/ICC2015/font-experiments$ epstool --copy --bbox single_channel.eps --output single_channel1.eps

or simply can do

adila@adila:~/Desktop/multichannel-RPL/ICC2015/font-experiments$ epstopdf multi_channel.eps

the warning shouldn’t appear anymore