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The run name becomes the /config: argument handed to terminal64.exe, and
MT5's own command-line parser splits that on whitespace. Any EA or
indicator with a space in its name therefore failed: the terminal logged
cannot load config "Z:\...\Moving Average_20260903_155537.ini"" at start
and then — instead of exiting — started as a NORMAL INTERACTIVE session,
connected to the broker and idled at ~110% CPU until run_strategy_tester
hit its timeout_sec (default 1800s). The failure was silent and slow,
which made it look like a hang rather than a bad argument.
Route both run names through a new _run_name() that collapses whitespace
to underscores and also replaces the characters MT5 dislikes in a path.
Verified against the stock Examples/Moving Average EA on EURUSD H1
(2026-01-01..2026-06-01, open_prices): it now completes in ~15s and
reports net_profit 183.27, profit_factor 1.58, 104 trades — identical to
a space-free copy of the same EA, so both paths cross-check.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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