7za extra v19.00 x64 doesn't unpack NSIS

[SLDiggie]

7za l MyNSIS.exe
ERROR: MyNSIS.exe : Can not open the file as archive

This is with NSIS installers that 7zFM will handle.

[myfreeer]

7za.exe (a = alone) is a standalone version of 7-Zip. 7za.exe supports only 7z, xz, lzma, cab, zip, gzip, bzip2 and tar formats. 7za.exe doesn't use external modules.

From the 7-zip.chm file.

[myfreeer]

Also, check for output in 7za i

7za i

7-Zip (a) 19.00 (x64) : Copyright (c) 1999-2018 Igor Pavlov : 2019-02-21


Formats:
  CK            bzip2    bz2 bzip2 tbz2 (.tar) tbz (.tar) B Z h
  CK            gzip     gz gzip tgz (.tar) tpz (.tar) apk (.tar) 1F 8B 08
   K     O      lzma     lzma
   K            lzma86   lzma86
                Split    001
  CK            xz       xz txz (.tar) FD 7 z X Z 00
  C   F         7z       7z            7 z BC AF ' 1C
      F         Cab      cab           M S C F 00 00 00 00
  C      O   LH tar      tar ova       offset=257 u s t a r
  C   FMG       zip      zip z01 zipx jar xpi odt ods docx xlsx epub ipa apk appx P K 03 04  ||  P K 05 06  ||  P K 06 06  ||  P K 07 08 P K  ||  P K 0 0 P K

Codecs:
   4ED  303011B BCJ2
    ED  3030103 BCJ
    ED  3030205 PPC
    ED  3030401 IA64
    ED  3030501 ARM
    ED  3030701 ARMT
    ED  3030805 SPARC
    ED    20302 Swap2
    ED    20304 Swap4
    ED    40202 BZip2
    ED        0 Copy
    ED    40109 Deflate64
    ED    40108 Deflate
    ED        3 Delta
    ED       21 LZMA2
    ED    30101 LZMA
    ED    30401 PPMD
    ED  6F10701 7zAES
    ED  6F00181 AES256CBC

Hashers:
      4        1 CRC32
      8        4 CRC64
     20      201 SHA1
     32        A SHA256