I don't know enough if this is a repeat somewhere else:

solve([x**3+y**3+cot(z)=12,x**2+z=1101,x*y=53],[x,y,z])

   WARNING (genufact): No known algorithm to factor
      6                 3
     ?  + (cot(z) - 12)?  + 148877, trying square-free.

(1)

gave:: WARNING (genufact): No known algorithm to factor 6 3 ? + (cot(z) - 12)? + 148877, trying square-free.

>> Error detected within library code: No identity element for reduce of empty list using operation append

Similarly:

 solve([x+cot(z)=12,x+z=0],[x,z])
 2) -> 
   >> Error detected within library code:
   No identity element for reduce of empty list using operation
   append

Category: Axiom Interpreter => Axiom Library Status: open => fix proposed

Status: fix proposed => fixed somewhere

no patch available