AX 2012 Report Error: A currency to convert from is required to retrieve exchange rate information.

I'm running the AR > Order Lines Not Invoiced report in AX 2012 and getting the following error: 

"A currency to convert from is required to retrieve exchange rate information."

I'll paste the stack trace below but it appears to be failing in the area of Sales Tax. We're only using USD, no foreign currency. I cannot find any empty or incorrect currency field values. Any suggestions?

Stack trace:

A currency to convert from is required to retrieve exchange rate information.

(S)\Classes\xInfo\add

(S)\Classes\Info\add - line 94

(S)\Classes\Global\error - line 3

(S)\Classes\ExchangeRateHelper\handleError - line 23

(S)\Classes\ExchangeRateHelper\validateFromCurrency - line 6

(S)\Classes\ExchangeRateHelper\getExchangeRate1 - line 24

(S)\Classes\CurrencyExchangeHelper\calculate - line 36

(S)\Classes\CurrencyExchangeHelper\calculateTransactionToAccounting - line 21

(S)\Data Dictionary\Tables\Currency\Methods\mstAmount - line 20

(S)\Classes\Tax\amountExclTax - line 188

(S)\Classes\Tax\baseAmountExclTax - line 122

(S)\Data Dictionary\Maps\SalesPurchLine\Methods\amountExclTax - line 67

(S)\Data Dictionary\Tables\SalesLine\Methods\amountExclTax - line 3

(S)\Data Dictionary\Maps\SalesPurchLine\Methods\lineAmountExclTax - line 11

(S)\Data Dictionary\Tables\SalesLine\Methods\lineAmountExclTax - line 3

(S)\Classes\SalesNotInvoicedDP\getFromSalesLine - line 11

(S)\Classes\SalesNotInvoicedDP\processReport - line 21

(S)\Classes\SrsReportProviderQueryBuilder\initialize - line 57

(S)\Jobs\