Question: using assuming

Question:using assuming

santana 106 Maple
Hi I have the following command: > LinearSolve(E0,Z,free=R) assuming real; when I execute this I get: Error, (in assuming) when calling 'LinearAlgebra:-LinearSolve'. Received: 'unexpected argument(s): free = R, LinearAlgebra:-LinearSolve' I am not sure why? can anyone explain? Without free=R it works fine...
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