Currency Conversion not working in BPM Project Invoice Approvals

Summary: We want to define Project Invoice Approval Rules with amount conditions in USD. The project invoice amount in local currency should get converted to USD and then compared to the amount condition in BPM approval rules. But we are getting errors in BPM. Is currency conversion not supported for Project Invoice approvals in BPM?

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We want to define Project Invoice Approval Rules with amount conditions in USD. The project invoice amount in local currency should get converted to USD and then compared to the amount condition in BPM approval rules. But we are getting errors in BPM. Is currency conversion not supported for Project Invoice approvals in BPM?