Can anyone confirm that insert (InsA or InsB) parameters whose name is just a number means that parameter is NOT valid as a destination?

I haven't seen any documentation or confirmation of that but testing appears to show that VALID parameters will have an actual name/acronym when listed in the destination sub-menu.

When making control assignments you use a drop down to select a destination category. For an Init Normal (AWM2) the list is:

Ins A

Ins B

Part Param

Element

Part Param 2

VCM Rotary

Then selecting one of those categories shows a sub menu of available choices

For Ins A and Ins B the default list of choices is a list of 24 parameters listed by number: InsA Param 1, InsA Param 2, ..., InsA Param 24 for Insert A

The Init performance has one part with one element and the defect effect for Ins A (and Ins B) is 'Thru' so my assumption is that there are NO valid destination parameters for either insert effect even though 24 are listed in the sub-menu.

The above is just explanatory to help understand the actual question/issue.

Choose the first available effect for Ins A (using menus) which is 'Reverb -> SPX Hall'.

Go to the 'Mod / Control -> Control Assign' screen and select the '+' sign to bring up the destination choices and choose 'Ins A'.

Notice that the list still contains 24 entries but with some choices having names while the others still have the original number. In particular

parms 2,3,6,7,8,9,11,12 have numbers

Limited testing appears to indicate only those parameters with actual names are valid destinations. The table on page 160 of the Data List doc shows the parameter list table for 'Reverb -> SPX Hall'. There are 16 slots in the table but only slots 1,2,3,4,5,...,10,11,12,13,14,15 have entries

Thus parms 2 and 3 are listed in the table but in the destination menu are listed as 'Ins A Param 2' and 'Ins A Param 3' - similarly for parms 11 and 12.

Parms 6,7,8,9 are not listed in the table but ARE listed in the destination menu using their parameter number.

NOTE: if you choose a 'preset' for the same effect the above parm settings seem to be unchanged. But if you choose a different effect then you get a different mix of parms with names and parms with numbers.

This strongly suggests that ALL parms with actual names are valid destinations for their respective effects. Meaning that Yamaha gave ALL valid destination parms names. Obviously it isn't reasonable to try to do an exhaustive test to confirm this.

Does anyone have any info confirming this is true? I have emailed support to try to get an answer.