Oops, old menus :(
I've updated the attachment above (now RmBeta.zip); in any case, building requires the full MasmBasic installation. Don't worry, it just adds the MasmBasic folder to \Masm32\, no writing to the registry etc. Make sure you unzip the ReTest.exe in RmBeta.zip to the \Masm32\MasmBasic folder.
I follow the development and usually I have the latest version. For the test, I downloaded the latest version again and installed again, I get the same message without changes. In that folder there is a file menus.ini, I renamed it and everything started as it should. I think you have an old installer in the topic =) Otherwise I can not explain where this file is

°BIUser-defined defaults
You may copy the following files from \masm32\MasmBasic\Res to \masm32\MasmBasic\Res\UserDef:
menus.ini contains settings for [System Apps], [&Help] and [AutoCode]
Keywords.ini contains the translation of keystrokes to full commands, e.g. ism -> invoke SendMessage,
RichMasm.ini see above, editor options
bldallRM.bav default OPT_ settings
bldallRM.bax the batch file template
In addition, the problem with anti-virus detection's exists in many examples, after the assembly process. Most likely some small part of the code is detected. There is clearly nothing to change, because you need to write to antivirus offices to report a fake detection.
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Can't open:
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Res\RichMasmGuide.asc
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OK
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Very strange, I checked the file and it is in place! :icon_eek: It happened after I accidentally inserted a messagebox auto code, and then closed the file without saving.
** Start C:\masm32\MasmBasic\Res\bldallRM.bat **
**** 32-bit assembly ****
*** Assemble, link and run MiniWin ***
*** Assemble using \masm32\bin\UAsm64 /c /coff tmp_file.asm ***
UASM v2.46, Dec 8 2017, Masm-compatible assembler.
Portions Copyright (c) 1992-2002 Sybase, Inc. All Rights Reserved.
Source code is available under the Sybase Open Watcom Public License.
*** MasmBasic version 25.12.2017 ***
## ToolTips: no hInstance found
using wc.hInstance instead ##
Tmp_File.asm: 122 lines, 3 passes, 97 ms, 0 warnings, 0 errors
*** Link MiniWin.obj rsrc.res using polink, sub WINDOWS ***
*** build all took 2786 ms ***
« OK »
I decided to repeat the experiment, I did everything the same way, the MiniWindow is no longer detected by the antivirus. After much experimentation, I realized what the problem of unstable work is, I always installed new versions on the old, without a new full reinstall. I deleted everything, installed it on a new one, and the problems disappeared

Here I have uploaded my old version with the new one installed on top, as proof of unstable work under such conditions -
https://mega.co.nz/#!Y1QCASCR!AAAAAAAAAADtcf2CXS-IpwAAAAAAAAAA7XH9gl0viKcI tried to compile two projects, the second one compiled well, to cause an error I changed the command "Jb - J". The problem is that the window with an error from the previous project is not closed. The first project is a file - MessageBox.asc, it's probably just a template, however, this results in the window not closing. The second project is jacts.asm, everything works well there.

Tmp_File.asm(957) : Error A2102: Symbol not defined : rrmins
Tmp_File.asm(957) : Error A2147: Too few arguments to INVOKE: dwtoa
Tmp_File.asm: 1132 lines, 2 passes, 68 ms, 0 warnings, 2 errors
*** Assembly Error ***The trick with the lst file has not yet repeated, I need to activate the OPT_DebugA /Fl option ::)