[Cuse]

It sounds like you are manually specifying a value for only Digital Output 7, converting it to an array, and sending that value to the SetDigOut VI. This could create problems, as doing that would (I think) default the other, unspecified values in the array to false, creating the situation that you have described. Instead, you'll need to use the GetDigOut VI first to obtain the current state of all your DigOuts. Convert the array to a cluster, unbundle it, and build a Boolean array, using DigOuts 0-6 for elements in the array, and specifying your 7th DigOut however you'd like as per your code. Then send the rebuilt array into the SetDigOut VI. I did a little experimentation and this worked for me, so hopefully it will solve your problems.