DLMS Profile Generic RAM Issue

I am trying to read Load profile data from profile generic.I can read all data from capture objects and buffer.I am using ESP32 controller and C language.
but when i call function for read Load profile data,Every time it will occupy some memory(RAM) which will not free by controller so after some time controller will crash due to low RAM
Same thing is happen in billing also.Please help me to solve this issue, My code is as Below.

oa_init(&objects);
ret = oa_getObjects(&_meterSettings.objects, DLMS_OBJECT_TYPE_PROFILE_GENERIC, &objects);
dlmsbb_init(&ba);

for (pos = 0; pos != objects.size; ++pos)
{
oa_getByIndex(&objects, pos, (gxObject**)&pg_1);

if(OBIS Code == Profile Obis Code)
{
com_read((gxObject*)pg_1, 3); //Reading attrbute. 3
com_readRowsByEntry(pg_1, 1, 5);

for (r = 0; r != pg_1->buffer.size; ++r)
{
ret = arr_getByIndex(&(pg_1->buffer), r, (void**)& va);

for (c = 0; c != va->size; ++c)
{
va_getByIndex(va, c, &tmp);

//reading load profile data here
}
obj_clearProfileGenericCaptureObjects(&(pg_1->captureObjects));
obj_clearProfileGenericBuffer(&(pg_1->buffer));
arr_clear(&(pg_1->buffer));
arr_clearKeyValuePair(&(pg_1->buffer));
oa_empty(&objects);
bb_clear(&ba);
}
obj_clearProfileGenericCaptureObjects(&(pg_1->captureObjects));
obj_clearProfileGenericBuffer(&(pg_1->buffer));
arr_clear(&(pg_1->buffer));
arr_clearKeyValuePair(&(pg_1->buffer));
oa_empty(&objects);
bb_clear(&ba);
}
}