When I try to sell goods from the control page (tech or military) it sometimes doesn't put it all on the market. For tech I select the sell max option but I get a message saying that some goods could not be put up for sale. Same issue with military. I will take a screenshot next time it happens.

Lack of turns most likely

Econ Control page doesn't update turns on hand until you "log" into your country, so when you try to sell without having turns it will give you that message

nah I made sure it showed that I had turns the last time I did it.

Min sales? If you are trying to sell less than 5k military units or 10 tech it gives that message too.

ok figured it out this time. Its cause I already have some goods on the market and it tries to sell max goods based on what I have on hand without taking the goods currently on the market into account. So it fails to put any of those goods on because it tries to send the max amount.

Can you be more specific? I was unable to replicate your problem. Both pages call the same function to determine how many goods can be sold.