I noticed that my algo was all of a sudden backtesting far too slowly, then after a few minutes I received the subject error reference I've never seen before referring to a line of code that simply calls a two parameter function that has been working fine all day, no changes, and was working during the sample summary day results printed below of multiple 1 min trades per day.

What is a 'broken pipe'? Is there a current Q system problem?

2013-08-02PRINT('1600', 'Size 0', 'PL 0', 'Cum 0', 'LBT 0', 'SBT 0', 'HLT -4950')

2013-08-05PRINT('1600', 'Size 0', 'PL -3245', 'Cum 0', 'LBT 0', 'SBT 1', 'HLT -4840')

2013-08-06PRINT('1600', 'Size 0', 'PL -952', 'Cum -3245', 'LBT 2', 'SBT 2', 'HLT -4950')

2013-08-07PRINT('1427', 'Size 0', 'PL -5437', 'Cum -9634', 'LBT 1', 'SBT 3', 'HLT -4950', 'MAX HALT')

2013-08-07PRINT('1600', 'Size 0', 'PL 265', 'Cum -9634', 'LBT 1', 'SBT 3', 'HLT -4950')

2013-08-08PRINT('1600', 'Size 0', 'PL 1188', 'Cum -9369', 'LBT 0', 'SBT 0', 'HLT -4950')

2013-08-09PRINT('1600', 'Size 0', 'PL 3469', 'Cum -8181', 'LBT 0', 'SBT 0', 'HLT -5060')

2013-08-12PRINT('1600', 'Size 0', 'PL 3031', 'Cum -4712', 'LBT 0', 'SBT 2', 'HLT -4840')

2013-08-13PRINT('1600', 'Size 0', 'PL 11091', 'Cum -1682', 'LBT 0', 'SBT 2', 'HLT -4620')

2013-08-14PRINT('1600', 'Size 0', 'PL 4689', 'Cum 9410', 'LBT 0', 'SBT 1', 'HLT -4620')

2013-08-15PRINT('1600', 'Size 0', 'PL 3125', 'Cum 14098', 'LBT 1', 'SBT 2', 'HLT -4620')

2013-08-16PRINT('1600', 'Size 0', 'PL -853', 'Cum 17223', 'LBT 0', 'SBT 0', 'HLT -4510')

2013-08-19PRINT('1600', 'Size 0', 'PL 3552', 'Cum 16370', 'LBT 0', 'SBT 1', 'HLT -4510')

The error must have happened sometime during 2013-08-20. I've been running backtests through this time period all day...

Thanks,

Mark