Error in Spatial Join, when used in model Builder

[DivyaSehgal]

Hey Guys,

I have been doing some spatial analysis in arcgis, and I have made a model, one of the issues that I am facing is that I have a set of points on which I am doing a clustering and since I want to maintain the original id, using Add Join geoprocessing tool to join the clustering output back to the original table. After that I am doing a spatial join of another feature class(Lets call it feature class A) with clustered points(Feature class B ) to get the features in the vicinity, and finally filtering out that these two features should be within a day of each other. My issue is sometimes the spatial join is generating an output and other times leaving all the features from feature class B empty in the final join table, any possible solutions would be appreciated. 

[DuncanHornby]

If you have left any selections on or set environment settings such as processing extent then this could lead to the scenario you are experiencing. Without further details and a repeatable sample it will be difficult for anyone to nail down the issue. May be its a database issue, you say nothing about the source of your datasets, e.g are they hosted feature layers or a shapefile on onedrive... Very different