Hi jcl, thanks again for your help. But there seem to be more problems with this than was apparent at first. For some reason the data is still messed up in a very irregular way. Below is a copy/paste of the zHistoryEditor showing a selection of lines from my t6-file. Out of this selection I market all lines yellow that show an incorrect opening price, which instead is the same as the closing price. For the same lines also the Low Price is wrong being the same as the High. The pattern and number of yellow marked, i.e. incorrect, lines seems completely random to say that it is somehow only weekends or other specific days that are messed up. I am completely stuck. I don't know where else to look for a mistake. It just doesn't look like a logical mistake. The csv-file is correct. I double and triple-checked it for the same lines that are messed up in t6 (Decimal separator is a comma here, since I am from Germany, values separated by space):

Time Open High Low Close Vol Spread


2010.01.04 00:00 0,121847078 0,121847078 0,122145414 0,122145414 0 0
2010.01.05 00:00 0,122145414 0,122145414 0,123722121 0,123722121 0 0
2010.01.06 00:00 0,123722121 0,123722121 0,12501125 0,12501125 0 0
2010.01.07 00:00 0,12501125 0,12501125 0,126735985 0,126735985 0 0
2010.01.08 00:00 0,126735985 0,126735985 0,127231076 0,127231076 0 0
2010.01.11 00:00 0,126694039 0,127231076 0,127231076 0,126694039 0 0
2010.01.12 00:00 0,125529274 0,126694039 0,126694039 0,125529274 0 0
2010.01.13 00:00 0,124676749 0,125529274 0,125529274 0,124676749 0 0
2010.01.14 00:00 0,124676749 0,124676749 0,124754429 0,124754429 0 0
2010.01.15 00:00 0,124754429 0,124754429 0,125364587 0,125364587 0 0
2010.01.18 00:00 0,124110736 0,125364587 0,125364587 0,124110736 0 0
2010.01.19 00:00 0,122703828 0,124110736 0,124110736 0,122703828 0 0
2010.01.20 00:00 0,120488331 0,122703828 0,122703828 0,120488331 0 0
2010.01.21 00:00 0,118012756 0,120488331 0,120488331 0,118012756 0 0
2010.01.22 00:00 0,118012756 0,118012756 0,118633315 0,118633315 0 0
2010.01.25 00:00 0,118633315 0,118633315 0,119293787 0,119293787 0 0
2010.01.26 00:00 0,119293787 0,119293787 0,119983405 0,119983405 0 0
2010.01.27 00:00 0,119983405 0,119983405 0,121241517 0,121241517 0 0
2010.01.28 00:00 0,119147956 0,121241517 0,121241517 0,119147956 0 0
2010.01.29 00:00 0,119147956 0,119147956 0,120793946 0,120793946 0 0
2010.02.01 00:00 0,12006779 0,120793946 0,120793946 0,12006779 0 0
2010.02.02 00:00 0,12006779 0,12006779 0,12152449 0,12152449 0 0
2010.02.03 00:00 0,120967992 0,12152449 0,12152449 0,120967992 0 0
2010.02.04 00:00 0,12056575 0,120967992 0,120967992 0,12056575 0 0
2010.02.05 00:00 0,119980909 0,12056575 0,12056575 0,119980909 0 0
2010.02.08 00:00 0,118730642 0,119980909 0,119980909 0,118730642 0 0