General ⇒ Problem with Transparency in beamer appears black

[luzmara]

Hi all,

All was working perfect, I just Check for update and applied it from the MikTex Console and now when I work with beamer and use PS to PDF I get:

%%%% WARNING: Transparency operations ignored - need to use -dNOSAFER

and the pdf generated is not right but the ps does. I use \begin{example} \end{example}, but it does not show it correctly, look the image, in general if I use \begin{block} \end{block} appears in the same way, block with or without title.

I use:

WinEdt --> Build: 20180507 (v. 10.3) - 64-bit
MikTeX --> Version 3.14159265-2.6-1.40.21 (MiKTeX 21.1)
Gsview 6.0
Ghostscript 9.52 (2020-03-19)

What can I do to solve this? Thank you in advance.



My MWE

Code: Select all

Code, edit and compile here:

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\documentclass[xcolor=dvipsnames]{beamer}
    \usepackage[spanish]{babel}
    \usepackage[latin1]{inputenc}
    \usepackage{color}
    \usepackage{xcolor}
    %\usepackage{amsmath}
    \usetheme{Madrid}
    \usecolortheme{rose} 
    \setbeamercovered{dynamic}  
    \begin{document}
        \frame{\frametitle{Distribuciones conjuntas (cont.)}
                \begin{example}
                Se lanza un dado 2 veces consecutivas.\\ \vspace*{0.3cm}
                $X_1$ $\Longrightarrow$ máximo valor obtenido en los dos lanzamientos.\\ \vspace*{0.3cm}
                $X_2$ $\Longrightarrow$ suma de los valores obtenidos en los dos lanzamientos.\\ \vspace*{0.3cm}
                Encontrar la función de distribución de probabilidad conjunta de $X_1$ y $X_2$ y la función de distribución acumulada conjunta de $X_1$ y $X_2$.
                \end{example}
                \transboxout%
              }
    \end{document}
 
 
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[Ijon Tichy]

Newer versions of ghostscript (which is used to generate the PDF from PS file) need extra command line parameters -dNOSAFER to provide transparency. I don't know, how to activate this using your workflow (because I do not use MiKTeX or WinEdt). I would recommend not to use PS to PDF but use PDFLaTeX, XeLaTeX or LuaLaTeX to directly generate a PDF from the LaTeX source.

[luzmara]

Thank you for your answer Ijon Tichy. I do not how to implement the command line you suggest, I will search. I use PS to PDF because in the original file I have many figures in EPS.

[Ijon Tichy]

I use PS to PDF because in the original file I have many figures in EPS.

Up-to-date TeX-Distributions support EPS→PDF conversation on-the-fly. If not, you can explicitly use LaTeX package epstopdf. No need to use DVI→PS→PDF only to import EPS images.