Inclusion Criteria:

- Patients with histologically-confirmed, advanced unresectable breast cancer or
advanced carcinoma with squamous cell histology (including NSCLC, SCCHN, and
esophageal) who have progressed on (or not been able to tolerate) standard therapy or
for whom no standard anticancer therapy exists

- Patient must provide a representative archival or fresh tumor biopsy for shipping to
a Novartis designated laboratory for profiling. Note: one block or ≥ 15 unstained
slides is required to determine the PI3K activation status. Whenever possible ≥ 20
unstained slides is preferred.

- Patient has measurable and/or non-measurable disease as per RECIST v1.1 guidelines
for solid tumors

- Patient is an adult (female or male) ≥ 18 years of age on the day of consent
signature

- Patient has an Eastern Cooperative Oncology Group performance status (ECOG PS) ≤ 2

Exclusion Criteria:

- Patient has received previous treatment with a PI3K inhibitor

- Patient has symptomatic CNS metastases

- Patients with asymptomatic CNS metastases may participate in this trial. The patient
must have completed any prior local treatment for CNS metastases ≥ 14 days prior to
the start of study treatment (including radiotherapy and/or surgery). If the patient
is receiving ongoing corticosteroid therapy, the following criteria must be met:

- The patient must be receiving a stable or decreasing dose ≤ dexamethasone 4 mg/day or
equivalent anti-inflammatory potency of another corticosteroid

- The dose of corticosteroid may not have been escalated for at least 14 days before
the start of study treatment

- Patient is currently receiving increasing or chronic treatment with corticosteroids
(>dexamethasone 4 mg or equivalent anti-inflammatory potency of another
corticosteroid) or another immunosuppressive agent.

- Note: Topical applications (e.g., rash), inhaled sprays (e.g., obstructive airways
diseases), eye drops or local injections (e.g., intra-articular) are allowed.
Patients with previously treated and asymptomatic brain metastases, are permitted to
use corticosteroids as per specific protocol criteria

- Patient is currently receiving treatment with drugs known to be moderate or strong
inhibitors or inducers of isoenzyme CYP3A. The patient must have discontinued strong
inducers for at least one week and must have discontinued strong inhibitors before
the treatment is initiated. Switching to a different medication prior to starting
study treatment is allowed.

- Other protocol-defined inclusion/exclusion criteria may apply.