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Error, Graphics card or other processes

Psychopy produces an error when the experiment gets “too big”.
The small experiment includes three routines. Routine one presents words out of an excel file followed by an empty text-routine that functions as a pause between the single words. These two routines are put together in a loop. After that comes a sound-routine. If I add another pause-routine (empty text for a couple of secs) somewhere in the experiment, psychopy produces the following error:

9.4782 WARNING Couldn’t me4asure a consistent frame rate.
-Is your graphics card st to sync to vertical blank?
-Are you running other processes on your computer?

9.7539 WARNING t of last frame was 25.18ms (=1/39)
9.8474 WARNING t of last frame was 27.02ms (=1/37)
9.9721 WARNING tof last frame was 24.94ms (=1/40)
10.0813 WARNING t of last frame was 24.04ms (=1/41)
10.2058 WARNING Multiple dropped frames have occured - I’ll stop bothering you about them
11.4753 WARNING Couldn’t measure a consistent frame rate.
-Is your graphics card st to sync to vertical blank?
-Are you running other processes on your computer?
11.7481 WARNING psychopy.sound.initPyo could notfind microphone hardware; recording not available

There are no other processes running in the background.
Is psychopy overstepping the limits of my pc (the experiment is really small??)
all files are saved on a usb stick to be able to run the experiment on another pc. Error codes are similar if i save everything on my harddrive.
Thankful for any help or advice!

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