Anybody can see what is wrong with this? I'm getting the first property value with the value = undefined

woIds[component.woid] = {data: ''};
woIds[component.woid] = {edata: ''};

after these two lines the object only has the edata property, so

woIds[component.woid].data += '\r' + component.itemid;

is doing += on an undefined value

@jkabot You are 100% entirely my bad, did not see it...

you can simplify the whole thing by not duplicating the logic and having no if-else

// initialize if not exist
woIds[component.woid] = woIds[component.woid] || { data: '', edata: ''};
... += ...
... += ...
if (component.taxo === '1') {
  ... += ...
}

Is ok now... after doing

👍

woIds[component.woid] = {data: ''};

woIds[component.woid].edata = '';