[Scip] Assertion failed SCIPisLE(scip, rootsol, SCIPvarGetLbGlobal(var)) in prop_rootredcost.c, line 168

[Sebastian Ruther]

  Hello,

I am solving a MIP. I keep getting the following assertion error:
Assertion failed SCIPisLE(scip, rootsol, SCIPvarGetLbGlobal(var)), file 
[...]\src\scip\prop_rootredcost.c, line 168.
The comment after the assert statement reads /* lb might have been 
increased in the meantime */
I'm not doing anything fancy, I just send it off to CPLEX. What is going 
wrong?

Thank you
Sebastian