exs advise sol offer inadequate take no action, page-16

Thanks Tweets. Does anyone know on what possible grounds they could claim that no royalty is payable. What has Soul said? I haven't read anything from them .For something that on the surface seems relatively straightforward, it's extremely arrogant to deny a payment. I wonder if there are any late payment clauses in the variation of terms ( 30 to 90 days ).
"Exco has attempted, without success, to enter into discussions with CopperChem to try and understand the basis of their dispute and may need to trigger the dispute resolution process under the Alliance Agreement to seek the recovery of outstanding royalty payments and confirm CopperChem’s obligations under the agreement".
Can you believe they won't even tell us why they feel they aren't obliged to pay. Maybe it's to keep our cash balance lower that it would be with the royalty payment thus lowering any valuation