Getting this error while running script in octave

[Jai Shanker]

Hi ,

I am getting this error while running a script in Octave-4.2.0

warning: opengl_renderer::render_text: support for rendering text (FreeType) was unavailable or disabled when Octave was built

warning: called from

    axes at line 66 column 10

    gca at line 58 column 9

    newplot at line 148 column 8

    pcolor at line 83 column 9

    Isohytes at line 57 column 7

ans = -7.4774

error: imread: unable to find file gtest.png

error: unhandled execution exception -- eval failed

Can anyone have an idea about this. I am using Amazon Linux AMI release 2016.09 and compile octave.

Thanks

Jai S Verma