Setting Probes
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If you wish to see the state of data at a given chain point, right click the chain point and select New probe…
The following dialog box appears:
To set a probe, you can specify CSV lists of variables and values that must be matched (or you can leave the fields blank to have the probe trigger on the next transaction through that chain point).
Variable can be surrounded by various special characters to indicate additional criteria. For example, consider a variable named VAR:
!VAR : means that VAR is not equal to the selection value
VAR* : means that the VAR content starts with the selection value
*VAR : means that the VAR content ends with the selection value
*VAR* : means that the VAR content contains the selection value
VAR< : means that the VAR content is less than the selection value
VAR> : means that the VAR content is greater than the selection value
For the < and > characters, the value will first be attempted to converted to a number. If that succeeds, full numeric comparisons are performed. If not, a lexicalist comparison will take place.
You can also select the occurrence number of the probe to see. This is especially useful when debugging loops.
By default, only the first 100 characters of any variable is recorded.
Once the probe is set, the chain point changes color to yellow:
It will stay yellow until a matching transaction reaches the chain point, at which point it will turn red:
You can now see the variables as they were when they reached the probe. To do this, right click on the chain point again and select View probe:
A dialog box appears with the variable information:
To close the dialog box, click the X in the top right corner.
