Option 1: Create a composite locator and add the locator created to the composite (even if it is the only one). By default, composite locators do not have a space in the field name.Option 2 (Before the locator is built and for all new locators): Edit the locator style XML file with which you would like to build a locator. 1. Open either the General.lot.xml or USAddress.lot.xml file located in the %ArcGIS Install Directory%/Locators folder. 2. Search for <default_input name= and edit the value within the quotes to remove the spaces in the name. Do this for all occurrences.Option 3 (With an already created locator): Edit the locator XML file. 1. Open the locator's loc.xml file (must copy it into a file folder first). 2. Search for <default_input name= and edit the value within the quotes to remove the spaces in the name. You will need to republish the locator.