iClose error: incorrect series array using

[enigmatrader]

I can not found on the inet an explanation for this error.

This statement is an indicator, running on a chart pair AUDUSD.

uj = iClose( "USDJPY", 0, 1 );

Tried using a cut down version of the example under mt4 help.

Print( "usdchf: ", iClose("USDCHF",PERIOD_H1,i) );

and still same error.

Thanks.