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Unistream SD card problems


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Hi, I am using the 7" unistream and i have data samplers running and writing to the SD card. I first noticed that nothing is displayed on my trend and on further investigation I found the data sampler's status (in its own struct) to be "-3" which is listed as a "save file eror". I then tried to save a screen shot and it also failed. Strange thing is, i can still browse the SD card using uniapps.

When i remove the sd card and insert it again with the plc running, it works fine. But when the plc is shut down and starts up again, it has the same problem.

Does anyone have an idea as to what's going on or what i am doing wrong

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