RangeError.txt

Lab RPi crashed when attempting to view the pico-engine UI

See what version of the engine it is running
http://frog.byu.edu:8080/api/engine-version
{"version":"0.45.6"}

Looked in pico-engine repo for /api of that version of the engine
  app.all('/api/engine-version', function (req, res, next) {
  app.all('/api/db-dump', function (req, res, next) {
  app.all('/api/root-eci', function (req, res, next) {
  app.all('/api/pico/:id/rm-channel/:eci', function (req, res, next) {
  app.all('/api/pico/:id/rm-ruleset/:rid', function (req, res, next) {
  app.all('/api/pico/:id/rm-ent-var/:rid/:var_name', function (req, res, next) {
  app.all('/api/ruleset/compile', function (req, res, next) {
  app.all('/api/ruleset/register', function (req, res, next) {
  app.all('/api/ruleset/flush/:rid', function (req, res, next) {
  app.all('/api/ruleset/unregister/:rid', function (req, res, next) {
  app.all('/api/ruleset-page', function (req, res, next) {

Start at root pico
http://frog.byu.edu:8080/api/root-eci
{"ok":true,"eci":"2VwBphr2pLHJU5tAxTfFw4"}

Find its direct children
http://frog.byu.edu:8080/sky/cloud/2VwBphr2pLHJU5tAxTfFw4/io.picolabs.wrangler/children.json
[
  {
    "parent_eci":"66fBCiBCuhkKj6oHLKNquE",
    "name":"Wovyn",
    "id":"cjk9xl65h0003cvd21ylfhszv",
    "eci":"QTHpy69wNzPke7Qz6k8Z5C"
  },
  {
    "parent_eci":"JVcBtA5u5CFeHendTtL6VJ",
    "name":"Bruce",
    "id":"cjk9zyyxy002lrsd2pmiz6ui1",
    "eci":"FPQRohNPh7kmCYieBro9fy"
  },
  {
    "parent_eci":"CydwxLc1FUrJ9wK1TS37yy",
    "name":"Aurora",
    "id":"cjka06guh003irsd273wbcjo7",
    "eci":"JZhaqve1577ZRQifrJdvjp"
  }
]

Suspect Wovyn device pico, so find children of Wovyn pico
http://frog.byu.edu:8080/sky/cloud/QTHpy69wNzPke7Qz6k8Z5C/io.picolabs.wrangler/children.json
[
  {
    "parent_eci":"cYGbEnnufTKyx4UiEYjVu",
    "name":"Wovyn Button",
    "id":"cjk9xql2x000gcvd2r80arr7m",
    "eci":"SkfEowDUGxaY7zjE8H31k5"
  },
  {
    "parent_eci":"9dWnFfPRiCqRWYA3466HHy",
    "name":"Wovyn quad",
    "id":"cjk9yx37n0007rsd278a5zysy",
    "eci":"DRxvX28FM5RZNhNAb7Dkku"
  },
  {
    "parent_eci":"LgE1kwfCVoxxEa8bpxHAka",
    "name":"Wovyn light",
    "id":"cjk9z7fxg0010rsd2buqmvg44",
    "eci":"7xnYWcL3efdNsAyFhQTUus"
  },
  {
    "parent_eci":"VPTZ8VW7BV5gcbNrx18Zk2",
    "name":"Wovyn CO2",
    "id":"cjk9zlgwm001hrsd2jkjmf44v",
    "eci":"XudHCsGCmrYtJZbKqFjp31"
  }
]

Suspect Wovyn quad pico, so find its installed rulesets
http://frog.byu.edu:8080/sky/cloud/DRxvX28FM5RZNhNAb7Dkku/io.picolabs.wrangler/installedRulesets.json
[
  "io.picolabs.logging",
  "io.picolabs.visual_params",
  "io.picolabs.wrangler",
  "wovyn_forwarder",
  "wovyn_notifications",
  "wovyn_probe_temps",
  "wovyn_router"
]

Suspect the wovyn_probe_temps ruleset b/c it keeps all data
consulting source code of the ruleset in repo
https://github.com/Picolab/Wovyn/blob/master/krl/wovyn_probe_temps.krl

Safe to just remove its probeTemps entity var b/c it uses defaultsTo
http://frog.byu.edu:8080/api/pico/cjk9yx37n0007rsd278a5zysy/rm-ent-var/wovyn_probe_temps/probeTemps
{"ok":true}

Also, if it had logging turned on, that would store a boatload of information, so remove ruleset
http://frog.byu.edu:8080/api/pico/cjk9yx37n0007rsd278a5zysy/rm-ruleset/io.picolabs.logging
{"ok":true}

Suspect the Wovyn CO2 pico b/c it also stores all readings
http://frog.byu.edu:8080/sky/cloud/XudHCsGCmrYtJZbKqFjp31/io.picolabs.wrangler/installedRulesets.json
[
  "io.picolabs.visual_params",
  "io.picolabs.wrangler",
  "wovyn_co2_averages",
  "wovyn_co2_levels",
  "wovyn_forwarder",
  "wovyn_notifications",
  "wovyn_router"
]

consult its source code
https://github.com/Picolab/Wovyn/blob/master/krl/wovyn_co2_levels.krl

Safe to just remove its co2_levels entity var b/c it uses defaultsTo
http://frog.byu.edu:8080/api/pico/cjk9zlgwm001hrsd2jkjmf44v/rm-ent-var/wovyn_co2_levels/co2_levels
{"ok":true}

And, now the UI works again!
http://frog.byu.edu:8080/