Problem with "mix" command on injection program

Hi, I'm working with a LC Infinity Lab 1260, which has a standard autosampler and 100 uL loop. I'm trying to achieve a very simple injection program, but keep failing. All I want to do is to draw 50 uL from a sample vial, 50 uL from a second sample vial, mix them and inject the mixture; but if a set the "mix" command, it ends up in the following error: "Draw or eject command failed due to allowed volumen exceeded". If I omit this command, it runs perfectly. The same program shows no error on LC 1100 and 1200. Any thoughts?

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