Hi there! Sorry if posting this here is incorrect The use case here is I'm trying to update the current side of a token to a number I specify. The side doesn't update, though I can update the nameplate of the token in the same script. !token-mod {{ --ignore-selected --ids -MRGf3xwP93QBJt1UkaQ --set currentside|1 name#'Clear Skies' --ignore-selected --ids -MRGf4iT0Oz2VzF_Zk8O --set currentside|1 name#'No Wind' }} Oddly, the above script doesn't change any token sides, but it will update both tokens to "No Wind". That's fine in this case, as all I really need to fully work is: !token-mod {{ --ignore-selected --ids -MRGf3xwP93QBJt1UkaQ --set currentside|1 name#'Clear Skies' }} This script looks exactly the same as another script I use to operate a clock handler rollable table token which I made a while ago and that script seems to operate on that other token just fine. That led me to experimenting with my new rollable table token by appending additional images to the table, which led to the below error JSON in Roll20 chat. Any thoughts here? I'm not sure what I'm doing wrong. {"msg":{"content":"!token-mod --set imgsrc|+-MRGme9qbeHl1K6ejQ4j --ids -MRGme9qbeHl1K6ejQ4j","playerid":"-MJN2WmdUl-5XdFgjEfe","type":"api","who":"GM (GM)"},"version":"0.8.63","stack":"TypeError: Cannot read property 'substring' of undefined\n at TrackedObj._validateAttrs (/home/node/d20-api-server/api.js:906:27)\n at TrackedObj.set (/home/node/d20-api-server/api.js:996:18)\n at applyModListToToken (apiscript.js:3188:15)\n at apiscript.js:3567:39\n at Function.each (/home/node/d20-api-server/node_modules/underscore/underscore.js:1310:9)\n at _. [as each] (/home/node/d20-api-server/node_modules/underscore/underscore.js:1829:39)\n at handleInput (apiscript.js:3566:26)\n at eval (eval at (/home/node/d20-api-server/api.js:154:1), :65:16)\n at Object.publish (eval at (/home/node/d20-api-server/api.js:154:1), :70:8)\n at /home/node/d20-api-server/api.js:1662:12","API_Meta":{"TokenMod":{"offset":0,"lineCount":3606,"version":"0.8.63"},"UDLWindows":{"offset":3606,"lineCount":304,"version":"0.1.1"},"UniversalVTTImporter":{"offset":3910,"lineCount":675,"version":"0.1.6"}}}