Barry please check the game " salada " in the FM7 software list.
Beside the obscure file name " 1û╩âNâèâAâfü[â^.T77 " (even I use a capable japanese font, it not display correct the characters), the range in the software list is not correct.

<!-- サラダの国のトマト姫.zip -->
<software name="salada">
<description>サラダの国のトマト姫</description>
<year>19??</year>
<publisher>Unknown</publisher>
<part name="cass1" interface="fm7_cass">
<dataarea name="cass" size="34030">
<rom name="1û╩âNâèâAâfü[â^.T77" size="34030" crc="BB3AD189" sha1="1A959989704B3616E9E9EA8112595A86E6E2936C" offset="000000" />
</dataarea>
</part>
<part name="cass2" interface="fm7_cass">
<dataarea name="cass" size="4538496">
<rom name="salada1.t77" size="4538496" crc="8A378BEC" sha1="00FB9BD58CACA28669F8249E8A84621A41A711DE" offset="000000" />
</dataarea>
</part>
<part name="cass3" interface="fm7_cass">
<dataarea name="cass" size="4628654">
<rom name="salada2.t77" size="4628654" crc="9F71B75D" sha1="289C5CBD54649ABA25616E2F53E2CE3CDAF10B2F" offset="000000" />
</dataarea>
</part>
</software>
The file for cass1 > 1û╩âNâèâAâfü[â^.T77 ( I call it data.t77) is only a save data image (created for using on the XM7 emulator) and content not a loader. So it can not work at once on MESS.
The range shall be :
1 > 3
2 > 1
3 > 2
I changed the range and it works.

PS:
Here you can see the
name , publisher and release date.