Alfresco check for adding files - package

Question

There is a review and approval workflow
On the start forms are attached files and selected executors(Package Items and People selection).
Then create a task is assigned to the previously selected executors.
Each executor sees the task assigned to it, and file attachments.
I need to check for adding files. While the executor has not added a file it can not approve the task.
I created the counter at the time of task creation taskListener event="create".
He counts the files sent to the executor.
Then I created another counter at the time of completion of the task taskListener event="complete", It also counts files.
Then I compare these two counters and if they are equivalent
It means that the executor does not attach files and he sees the error.
But this method works only for the first executor who approved the task.
The rest of the executors can already approve the task without adding files.
I do not know what the problem is.
Here's the code where I implemented it:
<userTask id="userTask5" name="Revies" activiti:assignee="${zvernennya_reviewnachassignee.properties.userName}" activiti:formKey="zvernennya:reviewnach">
<documentation>Review task</documentation>
<extensionElements>
<activiti:taskListener event="create" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[
if (typeof bpm_workflowDueDate != 'undefined') task.dueDate = bpm_workflowDueDate;
if (typeof bpm_workflowPriority != 'undefined') task.priority = bpm_workflowPriority;;
var count=0;
for (var i = 0; i < bpm_package.children.length; i++)
{
count++;
}
execution.setVariable ('count', count);
]]></activiti:string>
</activiti:field>
</activiti:taskListener>
<activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
<activiti:field name="script">
<activiti:string><![CDATA[
if(task.getVariableLocal('zvernennya_reviewnachtransitions') == 'Approve') {
execution.setVariable('zvernennya_reviewnachapprovalcount', zvernennya_reviewnachapprovalcount + 1);
}
var count_new=0;
for (var i = 0; i < bpm_package.children.length; i++)
{
count_new++;
}
if (count==count_new) {
var message = "\n\nAttach files!!\n";
throw new Error(message + "\n");
}
]]></activiti:string>
</activiti:field>
</activiti:taskListener>
</extensionElements>
<multiInstanceLoopCharacteristics isSequential="false" activiti:collection="zvernennya_executers" activiti:elementVariable="zvernennya_reviewnachassignee">
<completionCondition>${zvernennya_reviewnachapprovalcount >= zvernennya_reviewnachrequiredapprovalcount}</completionCondition>
</multiInstanceLoopCharacteristics>
</userTask>

Answer 1

I think you need to re-initialize the variable "count" in the 2nd tasklistener ("complete"). like so:
var count = execution.getVariable ('count');
var count_new= bpm_package.children.length;
if (count==count_new) {
var message = "\n\nAttach files!!\n";
throw new Error(message + "\n");
}