Error 1110 is the landesk cant find agent error. Meaning the machine is off or unreachable;
error 1638 is a msiexec error " another version of the product is already installed"
Error 1619 is a windows installer error https://support.microsoft.com/en-us/kb/316309
I would suggest manually running the package on one of the machines with the error and see what the results are.