If the Input Data Set was created using the Recombination and Linkage Groups AP, a valid variable for this field is the _MarkerName_ variable. Additionally, these variables must match, in name and in order, the variables specified in the Marker ID Variable field of the General tab.All of the variables in the specified data set are displayed in the Available Variables field.
Highlight the variables containing the pairwise LOD score identifiers.
Click to add the highlighted variable to the LOD Score ID Variable field, as shown below: