@
chaley - that confirms my deductions. Speaking for myself only, I can easily live with workarounds like 'do a restart'. For the benefit of others, the VL list for an individual book can also be refreshed via F2 (metadata edit) in any editable column
I only have half a dozen VL's in my biggest library, the other libraries no more than four. I don't actually use a Virtual Libraries column, I was only verifying Alaa's result. But no matter what I do, I cannot replicate any errors on the fresh library I created yesterday. This morning I tried removing one of the 3 virtual libraries columns, and adding it back with same names etc - no ill effects.
Would it help if I sent you my kitchen sink test library, where I did get the error?
BR