I beleive that the component names Steinsalz u. Salzmischung are associated with groups of elements rather than with groups of mesh nodes. The IC command expects a component name that identifies a group of nodes: 
It might work if you modify your command object as follows (the NSLE command selects nodes used by the currently selected elements):
cmsel,s,Steinsalz
nsle
ic,all,temp,20
cmsel,s,Salzmischung
nsle
ic,all,temp,600
allsel
I hope this helps!
Bill
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