What does Windows error code 1771 (RPC_S_FP_OVERFLOW) mean?

 
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RPC_S_FP_UNDERFLOW RPC_X_NO_MORE_ENTRIES

RPC_S_FP_OVERFLOW

A server calculation exceeded the representable floating-point range

RPC_S_FP_OVERFLOW reports a numerical exception raised while the server processed the remote call. It does not mean the RPC message or network buffer overflowed. One or more server calculations produced a magnitude beyond the active floating-point format or exception policy.

Capture the server stack and original inputs before converting values for display. Check unit mismatches, repeated exponentiation, unchecked multiplication, and client/server disagreement about float versus double. Validate ranges before computation and return a domain-specific error when an input is outside the supported model instead of allowing an RPC fault.

What to inspect

  • Preserve full-precision inputs and the server floating-point environment.
  • Check IDL and implementation types for accidental narrowing.
  • Apply safe range checks before operations likely to amplify values.

References


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