First, read Please read: make it easier to help you. It helps to provide a minimal working example.
Second, upgrade to JuMP 0.21. (0.19 is quite old, and this may be fixed in a new version.)
First, read Please read: make it easier to help you. It helps to provide a minimal working example.
Second, upgrade to JuMP 0.21. (0.19 is quite old, and this may be fixed in a new version.)